Malicious PDF — malware analysis report

Static analysis result for SHA-256 70862506078c81b2…

MALICIOUS

PDF

38.5 KB Created: 2020-08-12 06:51:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b816960f35d2b136233a5efc00139138 SHA-1: f7881879326e288e706e8f97f83a06dbbb4665ef SHA-256: 70862506078c81b2515fc1eb09fc365703f9e373e730fe45d331c60df392763a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, including a redirector at 'https://ttraff.ru/pify?keyword=bangla+alphabet+pdf+download'. This suggests a link farm or phishing lure, aiming to direct users to potentially malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=bangla+alphabet+pdf+download In PDF document text
    • http://files.pelebonitaspa.org/uploads/1/3/0/7/130738850/negevotusegax_wuzakunemenebov.pdfIn PDF document text
    • http://files.shoanlo.net/uploads/1/3/0/7/130740316/wunajojud_piwiwalijinofil_vavem.pdfIn PDF document text
    • http://files.suncoast-gems.com/uploads/1/3/0/7/130775866/begijufininab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8873/0525/files/fixabalativijodowij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/6256440594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2784/0669/files/madedepipopofubike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kesazemoluvumexon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0471/files/pugojax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/4209448585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/51302321925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8990/3259/files/20321296470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7106/8577/files/adding_fraction_word_problems.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6694/9786/files/78555958293.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B86 5052 bytes
SHA-256: 9727870904e76f354e18aa119951e8785180c9facb6da77661ca30e3ee5fef4e
font_01_sfnt_off00005cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CBF 10076 bytes
SHA-256: 23b8ceeff473f90710c001df4b4fc26c85a5e5d548963275648df82f79315c03
font_02_sfnt_off00007f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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