Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ab287762d0269a…

MALICIOUS

PDF

38.3 KB Created: 2020-07-30 21:00:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 59ad2fec7c36dfcc1f037dfeb92adff9 SHA-1: 351067ff898bf1a85f1ae94ac005d4b9405288b4 SHA-256: a4ab287762d0269aae3463f4df5f2dd20ea42195763fdbf086a4328ffef09c17
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of a link farm or SEO poisoning campaign. One critical heuristic identified a link to a known malicious redirector at 'ttraff.ru'. The document body is heavily obfuscated and does not provide clear textual lures. No scripts were extracted from this sample.

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=atmega88pa+pu+pdf In PDF document text
    • http://files.royalgymnastics.com/uploads/1/3/0/7/130775441/958381.pdfIn PDF document text
    • http://files.accurateinspectionsllc.com/uploads/1/3/0/9/130969053/mulefegos-zixudemataw.pdfIn PDF document text
    • http://files.thesanctuaryatmn.com/uploads/1/3/1/8/131856184/d83262d07.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/1/0428/9573/6988/files/bukuwafesejefikowadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5657/0266/files/viwab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/tebuduniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/1652690382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/xojobekokadiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/wipogutoveven.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/1/0440/3331/0870/files/juresitutenimivovet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8855/2870/files/57833763321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3143/6186/files/63298368357.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5045/1623/files/58685095130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8194/files/funenuvowigotipono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8604/4572/files/zamiveni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dosoxuwananeworatimuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/96244214798.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A89 4856 bytes
SHA-256: 051852c010899f59f22ef28bd4599dc16c030945a5c9e3a0b4532e6f6719bef6
font_01_sfnt_off00006b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0F 9760 bytes
SHA-256: 8ac3961754730c6eb2b3df94c502243b8cfe48f23ce9f5d000d775c6506d9fe4

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