Malicious PDF — malware analysis report

Static analysis result for SHA-256 4203a03b50b265e8…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 19:33:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29330d31e28b5b081ca1da0349299e94 SHA-1: 7ae3ad024b80038e809e464114490f0ac78fbaea SHA-256: 4203a03b50b265e8653ce245d41bf6884f32a7dff63428426ee879e263a3d4a0
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it contains numerous links to potentially malicious infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to a redirector, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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/wix?keyword=beyond+diet+14+day+meal+plan
    • https://static.u
    • https://static.usrfiles.com/ugd/cf14a4_9369f8e4a739440481caec7c23388e7f.pdf
    • https://static.usrfiles.com/ugd/2f7815_38e1b14a806742faadaf38e9a5101924.pdf
    • https://static.usrfiles.com/ugd/08fe48_eecb0681367e40339cc1ac5422d99f4d.pdf
    • https://static.usrfiles.com/ugd/b56239_707caa7a5b864d9b96eb773e3f74c8ae.pdf
    • https://static.usrfiles.com/ugd/9cc572_a53f8385ee8b47c2b20e03ae57200c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_676b10df6a5a49e8b9d0f0192a7b4ade.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e245d0cbf3d46e1b6d4f6411a156c38.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd91499aace4db4a667e13825fa6b25.pdf
    • https://static.usrfiles.com/ugd/1a89c8_215e2e7f0c0341c3acd3c4340ffd772f.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/jezegofiwuzokonixexabete.pdf
    • https://cdn.shopify.com/s/files/1/0430/9227/9445/files/97408262888.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/sat_answer_sheet_printable.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/89033181886.pdf
    • https://cdn.shopify.com/s/files/1/0433/0110/9920/files/nakisapigutabitaxusor.pdf
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/30467945220.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_off0000728e.bin
457204001437a3f1f50957c50d2721a464e3442e8065344f9d4b8d9378d9a1cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x728E 5124 bytes
font_01_sfnt_off000083ff.bin
4a033123499e8db6801dde9eb0ea4bf5c415e780384bd056afc9ada7706d7e28
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FF 10352 bytes