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)
MD5: 1838512b03b2eecddff4ee7f56b679b8 SHA-1: 2accd5b9688f8513472585fe5905c42512675614 SHA-256: 5b56ddd1e090f242542e7c8a674011487a98d6a7824496527212a935aaca9584
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one critical heuristic identifying it as a redirector link to a known malicious infrastructure. Another heuristic indicates a link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The embedded URL points to a suspicious domain, likely serving as a lure for users to download further malicious content or be redirected to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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
    • http://files.rebelcruzers.com/uploads/1/3/2/6/132695575/8815082.pdf
    • http://files.mountainlaureltennisclub.com/uploads/1/3/2/6/132695492/4d55d6.pdf
    • http://files.internallyflawless.net/uploads/1/3/1/3/131380213/98ac0e858fec17.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/28051334181.pdf
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/classification_of_plant_viruses.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/52929841292.pdf
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/mamexawobapigevopad.pdf
    • https://cdn.shopify.com/s/files/1/0431/4320/0929/files/bafuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7732/8286/files/fozavatul.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/jokuwoxopukuvogonotojirab.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/xevudanamosinedigazekum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/33711036180.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/jetoxibizusofejev.pdf
    • https://cdn.shopify.com/s/files/1/0435/8524/1256/files/kunepekidiferukevas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0430/8792/1313/files/sound_absorbing_materials_zwikker.pdf
    • https://cdn.shopify.com/s/files/1/0435/4198/7479/files/81713100637.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9288/files/84916574186.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

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

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