Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37831504d3d7894…

MALICIOUS

PDF

123.9 KB Created: 2020-08-04 14:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99c2b89c70276fa63a7c9c14959503f2 SHA-1: a7a52506da67f4431b090d8c7c58ce70dc5a22a2 SHA-256: a37831504d3d7894d05852d01b3c8ea6308c4b824afa55c4ee6bdf1b3257d2c6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One prominent URL, 'https://ttraff.ru/pify?keyword=what+is+metaphysics+in+philosophy+pdf', is flagged as a malicious redirector. The presence of a large number of links, including those hosted on cdn.shopify.com, suggests an attempt to manipulate search engine results or distribute malicious payloads through a network of seemingly benign documents. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=what+is+metaphysics+in+philosophy+pdf In PDF document text
    • http://files.jeanisaacson.com/uploads/1/3/1/3/131381363/jiruj_motov.pdfIn PDF document text
    • http://files.heuercadostudios.com/uploads/1/3/0/7/130738801/kaxigozowisesenuzi.pdfIn PDF document text
    • http://files.congregationbethtorahnj.org/uploads/1/3/2/3/132302999/9e79d29a35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/belezin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/79021506932.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/49880555218.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1358/5566/files/rodibulikemukij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7717/files/1296071660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7713/9613/files/all_animals_names_in_english_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7959/8229/files/red_chin_osrs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9108/2918/files/zugifezigupawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3504/9640/files/92387877618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5960/9753/files/idylis_portable_air_conditioner_troubleshooting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/91505913387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/ladder_logic_symbols.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jujirufevob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9963/5355/files/jelusogofobefugaxun.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A49 12612 bytes
SHA-256: a1cd921046b4ad5559ccfa2517b91dbd591184680feea17dcfabaf4f2e945a31
font_01_sfnt_off00017c31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C31 4196 bytes
SHA-256: ba1aaff7420250abfb58e5c40fd897aaf7e9d7b298e4c4e72c7932f5aa989ee4
font_02_sfnt_off00018ace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18ACE 5416 bytes
SHA-256: 033f5687eda9e4d528a1d6fb308f3c22f590247f60da8f0c50b6359c88c83dc9
font_03_sfnt_off00019d2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D2B 13404 bytes
SHA-256: 1f97837b02948e6d8cfc9586c57e8bd8adf87fae2c0a584df48c699b214e6487
font_04_sfnt_off0001c826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C826 16912 bytes
SHA-256: e009ebd6eea441b85a0d0a0175d12f5583b70e40b1704ac25c879d7eb9c2d5c9

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