Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3a27f70c073db6…

MALICIOUS

PDF

50.8 KB Created: 2020-07-29 18:31:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 007a74d3530fbeb6ffcd4153e659e4f0 SHA-1: a25a213c5ae57dceafc3389a770904d2a837e1e8 SHA-256: 1b3a27f70c073db6400762cace2a8364275e4701fbe97e615b730a9dd5c5f534
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=social+media+manager+resume+pdf'. This URL is presented within the document body, disguised as a 'social media manager resume pdf'. The file also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify. The ML classifier strongly indicates maliciousness. The primary attack vector appears to be social engineering, tricking the user into visiting a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=social+media+manager+resume+pdf
    • http://files.balancedwaw.com/uploads/1/3/2/3/132303005/tuvot.pdf
    • http://files.myanalogworld.com/uploads/1/3/1/1/131164424/6114060.pdf
    • http://files.thehill.services/uploads/1/3/0/7/130739892/lovirara_narikefowa_vuxakazoler.pdf
    • http://files.myan
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/27855075761.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/85508707695.pdf
    • https://cdn.shopify.com/s/files/1/0431/3936/7061/files/refem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6679/files/kexef.pdf
    • https://cdn.shopify.com/s/files/1/0430/8585/6919/files/borapebujijulat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/rolagezegubot.pdf
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/13387201389.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7637/files/zojubarajevudomigewenow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/lezawal.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000885e.bin
cf0f2f641e767eccdb384018e7d92dd6cac8f71b240c2ac186982a847aad56af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x885E 5380 bytes
font_01_sfnt_off00009a76.bin
25c091ca036fee99a9e79e01340a04b1893c8fa3864ef6135214f090af605814		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A76 10440 bytes

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