Malicious PDF — malware analysis report

Static analysis result for SHA-256 c737328ad5fa7b1d…

MALICIOUS

PDF

60.1 KB Created: 2020-08-02 20:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5d108895bd321ab04732f03e5301c3fc SHA-1: e41553c8c96f2d7ff9b359edcc1a3d7771c09290 SHA-256: c737328ad5fa7b1d06bf3b76d0e1d0db3026d3c2c33c7cdbb2d8bef3ac21a1de
194 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to a critical heuristic firing for a PDF redirector link pointing to ttraff.ru. Additionally, a critical heuristic detected a large PDF link farm, with many links pointing to cdn.shopify.com. The document body contains the URL https://ttraff.ru/pify?keyword=embraer+rj145+amazon, which is likely part of a phishing or SEO poisoning campaign to lure users to malicious content.

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=embraer+rj145+amazon In PDF document text
    • http://files.littletweetheart.com/uploads/1/3/1/0/131070469/zesazebixatigorezon.pdfIn PDF document text
    • http://files.usaexpressions.com/uploads/1/3/2/6/132695636/sanodovekebaxa.pdfIn PDF document text
    • http://files.rimatlanta.org/uploads/1/3/1/8/131872105/3955181.pdfIn PDF document text
    • http://files.delissimobuntingford.co.uk/uploads/1/3/1/0/131070051/barozisixivuzeg.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/1/0440/8400/2981/files/46345993841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/56402939178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4202/8182/files/51172278853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5382/4677/files/53381817980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/44567187524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6749/0972/files/windows_8._1_update_stuck.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1537/9866/files/23982493911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4933/6483/files/games_similar_to_sims.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1373/2512/files/59223611009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/foluxuworufoginedasipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9648/2727/files/splatoon_2_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8178/5753/files/63405313756.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6089/5650/files/kokoziwopifibo.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 5

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_off0000a299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA299 5108 bytes
SHA-256: f552fb37b4e4ee336fdf659fe4a791b746a5c772b6b394417b6273e98c2c5116
font_01_sfnt_off0000b3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3FA 14604 bytes
SHA-256: bbd90c066506b38205a05fd6661fedd6fba71458c710e4ba17a3e81504185cda

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