Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f151192896cacd7…

MALICIOUS

PDF

104.6 KB Created: 2020-08-14 03:51:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87eabbbb01e0e605f71334c0ccaf1a8b SHA-1: 3c838069a87083612fcacc5717edcc33152e8c73 SHA-256: 0f151192896cacd78c6262c9f64923472b2294799fe0a050d77ca837c08ef58f
162 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.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the same URL and a title suggesting a deceptive form. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content. No scripts were extracted, but the primary attack vector appears to be a phishing lure via a malicious link.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=caci+verdict+form+breach+of+fiduciary+duty
    • http://wivarunel.clarkhsu.com/uploads/1/3/1/4/131482975/xosuv_sefemixiv_xizejagewasaked_rorizorexa.pdf
    • http://files.janetsjungle.com/uploads/1/3/1/6/131606605/00e18f.pdf
    • http://files.beautifulrooms.london/uploads/1/3/1/4/131454984/c146471.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/nuzodemizebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/86447423982.pdf
    • https://cdn.shopify.com/s/files/1/0430/0773/8019/files/veledigofaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4456/files/29347403580.pdf
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/weekly_tax_table_1_july_2020.pdf
    • https://cdn.shopify.com/s/files/1/0447/9166/0695/files/introduction_to_microelectronic_fabrication_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9461/4940/files/valid_us_address.pdf
    • https://cdn.shopify.com/s/files/1/0429/4197/2636/files/1485198674.pdf
    • https://cdn.shopify.com/s/files/1/0435/7488/6563/files/seruvepizowib.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/dofoxazakapiwojawelofumaj.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_off00015e9b.bin
09845fc3463d1fe84c2af6a699077d5e8e2a8b3108b0e803a198cafab6357e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15E9B 5256 bytes
font_01_sfnt_off00017061.bin
98c6815f097abbcacd9689e623660705e5fb55c8be63c5553762fed52da75f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17061 10696 bytes

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