Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1554f2a6374899e…

MALICIOUS

PDF

70.5 KB Created: 2020-08-06 18:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9d91041a7bd85650cb49e809fc7fba3 SHA-1: 00bffda92999a7202096b293f65e7c8d32835656 SHA-256: b1554f2a6374899e8216553bf3b06323a159fd0149f37ec9f831fed061b6fed4
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is associated with the lure 'Allergan patient assistance program pdf'. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous external PDF links, suggesting a broader distribution or SEO poisoning tactic. The ML classifier strongly supports the malicious nature of this PDF.

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=allergan+patient+assistance+program+pdf
    • http://bifigifu.madxllc.com/uploads/1/3/1/4/131438453/vexovuf.pdf
    • http://files.discoverdiving.im/uploads/1/3/0/7/130738507/1871462.pdf
    • http://futid.brockhousenurserystalbans.co.uk/uploads/1/3/1/0/131070476/1db3b5af.pdf
    • http://files.thewellnysstree.com/uploads/1/3/1/6/131637374/jororosetol_rudoka.pdf
    • http://files.lutesfamilyart.com/uploads/1/3/2/6/132695445/satafivazizin.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/opportunities_beginner_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/47227497061.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/42052422131.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/2013_kia_sorento_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/wexitenugozazimolifojonak.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/fosovawok.pdf
    • https://cdn.shopify.com/s/files/1/0429/1297/2963/files/56861446930.pdf
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/norelobufimuxakidupel.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/92594113828.pdf
    • https://cdn.shopify.com/s/files/1/0429/2762/0249/files/mawurimini.pdf
    • https://cdn.shopify.com/s/files/1/0433/4728/0026/files/76808594398.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_off0000d3a1.bin
de064763cdbb05f383364376e16e1033d09d0328f38016f7dedd4a9b3eebfb0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 5464 bytes
font_01_sfnt_off0000e61e.bin
ca3a560eede37a8b2d9c21052e808f45d48ae7091703f75f740c1ea4ef33c9a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE61E 10748 bytes

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