Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b0adfb24111372…

MALICIOUS

PDF

43.9 KB Created: 2020-08-02 14:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0feb25dad01aafd1bde6fa08d02bd1d SHA-1: 494691f29d11c146871194c08f7118a1711d708e SHA-256: 63b0adfb241113727d8bbe3a4ced69667a3c782dec7442d037e4c2ff4ae2df91
174 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains references to 'vzw.com/vm-update303', suggesting a lure for a fake service update. The presence of a large number of embedded links, many pointing to Shopify domains hosting other PDFs, indicates a link farm or redirection infrastructure, further supporting a malicious intent to distribute or redirect users to harmful content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.cc/pify?keyword=vzw.+com%252F+vm-+update303
    • http://files.larnemusicfestival.com/uploads/1/3/0/9/130969140/zafedenevifaxizagu.pdf
    • http://files.nursingarchivesassociates.org/uploads/1/3/1/3/131379615/73b4eb4e8.pdf
    • http://files.rozelcruz.com/uploads/1/3/2/7/132740337/4077060.pdf
    • http://files.wpadistrict18aa.org/uploads/1/3/0/7/130775398/2d4bd6f02.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4628/1121/files/gitepifum.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7913/files/pewas.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/nikodemuwivagudezalem.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/17818040549.pdf
    • https://cdn.shopify.com/s/files/1/0429/8312/9251/files/86757208311.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/fiwexadefefamuzamaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/gipilegipibaposiden.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/fewisogimuzoledurotujat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/95067433917.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/rejalubizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9841/files/pazofa.pdf
    • https://cdn.shopify.com/s/files/1/0438/2762/6134/files/14173799533.pdf
    • https://cdn.shopify.com/s/files/1/0440/0329/5382/files/incremental_backup_script_in_bash.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_off00006b0b.bin
3edf614771a4890bcfe3bad23e01c51f37bb17a68fbbad4b5db7b452c9a143fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0B 5484 bytes
font_01_sfnt_off00007ddd.bin
09235bcf585b8a6710b44c1876ca2494be1e91772c35c7b73c9312cf908d26cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDD 10896 bytes

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