Malicious PDF — malware analysis report

Static analysis result for SHA-256 c790898dad32a733…

MALICIOUS

PDF

52.5 KB Created: 2020-08-23 01:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 18e4d70f73aeeb1be51f22e9919f50ec SHA-1: 6dd80ab10fe7c000ce8d874a6e51e6adeac4f283 SHA-256: c790898dad32a733d83cb0cb86ecb01112f98563c8ee5fb661217498bac3898e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a known malicious redirector, disguised with keywords like 'bookkeeping excel template small business'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, also contains the malicious URL. The presence of multiple embedded links to external PDFs, some of which are benign and others unknown, suggests a link farm or redirection strategy to obscure the final malicious destination.

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=bookkeeping+excel+template+small+business In PDF document text
    • http://duwujuja.bgiapartments.com/uploads/1/3/1/6/131606289/pesizu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/succubus_south_park.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4160/2198/files/56170701877.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/zosasedezefubisuluzaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1514/2551/files/15055700040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/6190/7351/files/fun_facts_about_the_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/47765217230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9994/7169/files/10805510113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7640/files/calzedonia_katalog_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/ragurerowewojaremefogo.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 2

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_off000081c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C6 5360 bytes
SHA-256: 922a52ade2db9cac60001a08231355e89a164c758fb0e2f489485ccf1ba53f83
font_01_sfnt_off000093f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F1 10384 bytes
SHA-256: ac840b22555232f8a344629fb2c8ddbce5859b9f868e58f040acccd6332b1c2b
font_02_sfnt_off0000b750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB750 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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