Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b56ddd1e090f242…

MALICIOUS

PDF

65.2 KB Created: 2020-08-11 04:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1838512b03b2eecddff4ee7f56b679b8 SHA-1: 2accd5b9688f8513472585fe5905c42512675614 SHA-256: 5b56ddd1e090f242542e7c8a674011487a98d6a7824496527212a935aaca9584
194 Risk Score

Malware Insights

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

The PDF contains multiple links to redirector infrastructure, specifically `https://ttraff.com/pify?keyword=applied+behavior+analysis+pdf+download`, which is flagged as malicious. The document body, though heavily obfuscated, contains this same URL, suggesting it's the primary lure. The presence of numerous PDF links, many pointing to Shopify domains, indicates a link farm designed to improve search engine ranking for malicious content. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=applied+behavior+analysis+pdf+download In PDF document text
    • http://files.rebelcruzers.com/uploads/1/3/2/6/132695575/8815082.pdfIn PDF document text
    • http://files.mountainlaureltennisclub.com/uploads/1/3/2/6/132695492/4d55d6.pdfIn PDF document text
    • http://files.internallyflawless.net/uploads/1/3/1/3/131380213/98ac0e858fec17.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/1/0434/3152/6557/files/28051334181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/classification_of_plant_viruses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/52929841292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/mamexawobapigevopad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4320/0929/files/bafuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/fozavatul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/jokuwoxopukuvogonotojirab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/xevudanamosinedigazekum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/33711036180.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/jetoxibizusofejev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/kunepekidiferukevas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/sound_absorbing_materials_zwikker.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/81713100637.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/84916574186.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0B6 5512 bytes
SHA-256: c5db6370313743de673aeacc7d072ffc9b14d440893ff273ee681a7e4ba6c012
font_01_sfnt_off0000d37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37A 10780 bytes
SHA-256: 23f951949d49f146ccbb1c4a1a2d1d3a8318c5dcdd05754177c7fd17bba2c216