Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b095f85f4e5a78…

MALICIOUS

PDF

39.0 KB Created: 2020-07-28 16:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88bb4736f0b698c38d8fd9bc66885d71 SHA-1: 776c271278d1f92f8d8fed371ffd56a324e7b34f SHA-256: 79b095f85f4e5a78aba88ee82e4784b70ea9b6ed11e5ab76cf69fdc5e81161a5
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external PDFs, many of which redirect through a known malicious domain (ttraff.ru). This indicates a link farm or phishing attempt, likely to trick users into downloading further malicious content or visiting malicious sites. The ML classifier also strongly flagged this PDF as malicious.

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=pdf+encyclopedia+of+world+history In PDF document text
    • http://files.suitedreams.com/uploads/1/3/0/9/130969761/885419ab6ae9a.pdfIn PDF document text
    • http://files.lms-art.co.uk/uploads/1/3/1/3/131381464/rimidonoka-babotenanukojas-disuz-xapogozolivariv.pdfIn PDF document text
    • http://files.jdbscholarship.com/uploads/1/3/2/7/132740584/4429280.pdfIn PDF document text
    • http://files.dragonchoirs.net/uploads/1/3/1/3/131380504/nebemebiber-gorik-fiwumoxunubowe.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/1/0440/6483/3686/files/diwokumuxabubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/bijojikidelenufafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/1190527939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/wudafetaluzoweta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/faletamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/88858349688.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/vomomajulozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/bedebamejejotaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/99282506561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/23276110104.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_off00005b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 5224 bytes
SHA-256: 8a37fc370e5eb20911ffab641ef1f128b2648019a6866a7547da438660d4ba12
font_01_sfnt_off00006cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD9 9968 bytes
SHA-256: 6246d769d030d59e327fc5cc019091e8d235442ae0a1eb9298330c3a45f7e0e6

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