Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccfd504e4ea87f5…

MALICIOUS

PDF

36.1 KB Created: 2020-08-12 09:19:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4095a7a0766a362b1de23b581a419700 SHA-1: c342fe4001b3c117e29f7657cfd43764604d8103 SHA-256: 5ccfd504e4ea87f5c34b47cdbe61ccf34b25dbd44b2c23f4fc45082bacae32ed
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to benign Shopify domains, but one critical link directs to a known malicious redirector. The document body, though garbled, contains keywords related to technical topics and the malicious URL, suggesting a lure. The presence of a large number of external PDF links indicates a potential link farm or SEO manipulation tactic, which is often used to mask malicious activity.

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.ru/pify?keyword=inverter+welding+machine+circuit+board+pdf
    • http://files.hornedreaders.net/uploads/1/3/2/3/132302960/wofekijewisofibajap.pdf
    • http://files.ottawanavyleague.org/uploads/1/3/1/8/131856326/17e918.pdf
    • http://giwagene.wrightsltd.co.uk/uploads/1/3/1/6/131607029/3655428.pdf
    • http://werilina.telosmagazine.org/uploads/1/3/1/3/131381489/86839b5.pdf
    • http://files.powerboxingfitness.com/uploads/1/3/1/3/131398125/d58287e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/jiferar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdf
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/68034539391.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/tunenagususegezedame.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/8317603387.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/sapamovev.pdf
    • https://cdn.shopify.com/s/files/1/0437/7087/1970/files/24874619352.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/azure_stack_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/90126250533.pdf
    • https://cdn.shopify.com/s/files/1/0429/5560/4134/files/92657103351.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/40655584571.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_off000050a1.bin
decdbaf4d88525a5ec0a3c746eb63a8da2448e68c2ee4a637e4066ba2fdc7237
pdf-font-stream PDF embedded font (sfnt) at offset 0x50A1 5620 bytes
font_01_sfnt_off00006394.bin
f503128cb49048e5ec7d7165eec4f62f80c20b13471a9a1d5328debbe6ef2625
pdf-font-stream PDF embedded font (sfnt) at offset 0x6394 9396 bytes