Malicious PDF — malware analysis report

Static analysis result for SHA-256 71d2588af878b3c4…

MALICIOUS

PDF

41.1 KB Created: 2020-08-19 13:30:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a108e3d78fa8ce9e42d9c0de065d1165 SHA-1: 00b1f8ab5887e31d9f6701e86609a62683e68fd6 SHA-256: 71d2588af878b3c45d08e16d1f8b08702848c07b033cdb3fa26ce422900e3f0e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains a reference to the same malicious URL, suggesting an attempt to trick users into downloading further malicious content or visiting phishing sites. 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=alien+skin+bokeh+2 In PDF document text
    • http://files.ohioadolescenthealth.org/uploads/1/3/2/7/132740905/856f4f516e034ea.pdfIn PDF document text
    • http://files.belleandbeaucompany.com/uploads/1/3/1/4/131438541/2048877.pdfIn PDF document text
    • http://kigalep.jacquelyncarterdesigns.com/uploads/1/3/1/6/131637136/kivorogo.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/1/0436/1791/0941/files/24389179571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/zijizefiribub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9178/6918/files/nawata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/sidejewu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/35361451082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1152/2209/files/fasuvulerugeranisawexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0686/8126/files/antropocentrismo_filosofia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/76957488457.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2036/9576/files/alphago_paper_nature.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7881/8715/files/convert_to_svg_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/japefidiluwugomajab.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_off00005749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5749 4500 bytes
SHA-256: a51c78dfa14609120997abb4742f63f2f319a8eed0a7bba782734d8a80a905b6
font_01_sfnt_off00006678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6678 10248 bytes
SHA-256: c2de8a47a19e43233aa5d5b07a74346eaf17a9f3d3685ca19142a1fa469caa5b
font_02_sfnt_off000089a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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