Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcb09156440beda…

MALICIOUS

PDF

45.8 KB Created: 2020-08-18 13:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d4c1dfe5bf758d6f306c97879a334143 SHA-1: 46554e461dd32b49c70e8ced9ef82ed6d6b95d13 SHA-256: bbcb09156440bedaa45229745326aaa307b2c89aa617287a6b7b51ebcaedb4c3
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded links, with one critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to salary expectations and a URL that appears to be part of the malicious redirection chain. The presence of a PDF link farm further suggests a malicious intent to distribute links to potentially harmful content.

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.
  • 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
  • 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=salary+expectations+answer+internship
    • http://files.baileycreekdoodles.com/uploads/1/3/2/7/132740552/jifawusologen.pdf
    • http://files.killerhorrorcritic.com/uploads/1/3/1/4/131453214/0515705cbfaa.pdf
    • http://files.midlandsurgicalinstruments.com/uploads/1/3/1/4/131483098/2793398.pdf
    • http://pezof.allstudentslearn.com/uploads/1/3/2/6/132681513/d1cefca5011.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/modern_physics_randy_harris_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3883/files/mipolelugidovoxejemu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37394074323.pdf
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/agradecimiento_en_ingles_formal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/32889126042.pdf
    • https://cdn.shopify.com/s/files/1/0440/3009/9606/files/calculus_and_vectors_12_mcgraw_hill_ryerson_chapter_1.pdf
    • https://cdn.shopify.com/s/files/1/0436/1404/4323/files/java_covnert_x._509_to._pem.pdf
    • https://cdn.shopify.com/s/files/1/0432/1204/6495/files/angielski_zadania_b1.pdf
    • https://cdn.shopify.com/s/files/1/0437/7745/8334/files/the_biopsychosocial_formulation_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1639/files/ventilator_associated_pneumonia_prevention_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/ziravetixabuzuxafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/vonugaruzulow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6708/8791/files/digestion_de_carbohidratos_lipidos_y_proteinas.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/
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/vonugaruzu

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007346.bin
641138885f9e3a7a767b712a8cb2d6a79db5e298d864f3f1fe32b7a0ac3e1897
pdf-font-stream PDF embedded font (sfnt) at offset 0x7346 5388 bytes
font_01_sfnt_off000085a3.bin
b81cfbfd137451dfc22dcccfe93d597c74a8e6367fc144b80ce66f008e3efbfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A3 10740 bytes