Malicious PDF — malware analysis report

Static analysis result for SHA-256 138c2d7be2d789a3…

MALICIOUS

PDF

57.2 KB Created: 2020-08-05 08:26:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf9da2680901cd4e25b4b51f8c491072 SHA-1: 208266c7821ae15d62b841ea8b62612f51db300d SHA-256: 138c2d7be2d789a3e91c780dcfe5bd4c72f8a404d7ba9a948adc7a154047851c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are part of a link farm designed to appear as legitimate downloads. The primary malicious link, https://ttraff.ru/pify?keyword=neoclasicismo+literatura+espa%25C3%25B1ola+pdf, is identified as a known malicious redirector. This indicates a phishing or scam attempt, likely using the document as a lure to drive traffic to malicious infrastructure.

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=neoclasicismo+literatura+espa%25C3%25B1ola+pdf In PDF document text
    • http://files.holostherapies-edinburgh.com/uploads/1/3/0/7/130739809/porebotejeraj.pdfIn PDF document text
    • http://files.handsfeetandwings.candletothesun.com/uploads/1/3/2/8/132814155/bofewefaliboxejemiwe.pdfIn PDF document text
    • http://files.musicliteracysolutions.com/uploads/1/3/0/7/130775837/lotago_tuvad_penazafuf.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/1/0428/1021/2519/files/rodotudoserubez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/54281990773.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4695/9261/files/67008443528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/wisipapokuxad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/mokilabovonuka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/povusopurivozemufuxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/wuxisuguvamof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/pitabalaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/vovev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1612/6625/files/73087568602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/46120501851.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
🗂 Part of campaign: seejaysrepairs.com 5 samples

Related samples 3

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_off00009e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E92 5484 bytes
SHA-256: d4343018e285a9e3384fca5d0d738de7edcbe32d2fae534be80cf92bdbe06b3f
font_01_sfnt_off0000b0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E2 11288 bytes
SHA-256: 97026ba41a5e36fb9ace6effe74fc6fe781aa2612970eaa5183c0f89c5bc7b02

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