Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bacd1b3fc288448…

MALICIOUS

PDF

45.2 KB Created: 2020-08-10 21:21:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d2dec2bc6132fb40621eed3b2831820 SHA-1: 494690a27bcb23f5ff244f8e65e5bc06fc60131d SHA-256: 5bacd1b3fc288448bc6a2ab0b6099432f5fc96404159511c41975e6629d366e5
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 to known malicious infrastructure. The document body, though obfuscated, includes text suggesting a 'business plan report sample pdf' lure, and the primary URL points to a redirector designed to lead users to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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=business+plan+report+sample+pdf
    • http://files.pasinfonia.org/uploads/1/3/2/6/132681558/luroru-putas-wasonorofadi-bukafutominosi.pdf
    • http://files.myfutra.com/uploads/1/3/1/3/131384018/netax.pdf
    • http://files.vibrantpet.com/uploads/1/3/0/8/130874019/xewonefa-giwelox-xegojojegikoz.pdf
    • http://files.treesurgeongloucester.com/uploads/1/3/2/7/132710763/582091.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/vekukirudabirezoliba.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/73011245133.pdf
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/31346094377.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5396/files/vajavurepa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7670/4664/files/nixifitunexafizi.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/jimopenezevariluvolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/43778875991.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/8879715144.pdf
    • https://cdn.shopify.com/s/files/1/0432/7027/5237/files/32768081902.pdf
    • https://cdn.shopify.com/s/files/1/0433/9181/1734/files/92400754750.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_off00007289.bin
f371bf5ed3e5e1559b1332d8fd41a0e423390b421196ece979cf3861fb8ad75a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7289 5236 bytes
font_01_sfnt_off00008436.bin
42e4625d11db5e4d6c14d7dde13694409736023c19f17f40a77d54ac2732e398
pdf-font-stream PDF embedded font (sfnt) at offset 0x8436 10456 bytes