Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f79860d52d15487…

MALICIOUS

PDF

58.4 KB Created: 2020-08-12 06:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fd257ef2b155cecc3088903ed058a8de SHA-1: 36dcd233061cdea253da6cf488b9fae1b2184748 SHA-256: 1f79860d52d1548735ddca2f0b2cdecc02931f30f758193b15ae0c82cba9ef0a
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting an attempt at SEO poisoning or a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious payload delivery mechanism. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document body and heuristics confirm a link-based attack pattern.

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/wb?keyword=themen%20aktuell%201%20bilingual%20workbook%20pdf In PDF document text
    • http://wakekuj.oldlakewoodshop.com/uploads/1/3/2/8/132814930/5fb76.pdfIn PDF document text
    • http://files.satchelcafe.com/uploads/1/3/2/3/132302858/pukifodarubud_bamujob_fotelarutele.pdfIn PDF document text
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.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/1/0429/8162/1919/files/kupekiwezar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/gisolonakuwetuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/56041689969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7916/3285/files/cazadora_de_hadas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/cracking_toefl_ibt_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/89225470776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0325/3660/files/world_map_black_and_white_with_country_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/zosijefapixiduxiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/41952333351.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_off0000499a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x499A 30576 bytes
SHA-256: 1fbc185976f3acfdad25ea679797a4e02dfcf536a1c3715c6c8b035422b0a3e5
font_01_sfnt_off0000a606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA606 5572 bytes
SHA-256: 8f749c5766f3108bff63d513da2cbdeb638392c4df6bb35e4657db94627d0a92
font_02_sfnt_off0000b8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E3 10648 bytes
SHA-256: 36d3e2ce15027ac2269d930ed6bf66f0f8800718ece398f272c7b8079e2931ea

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