Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6384820e3bacae1…

MALICIOUS

PDF

33.6 KB Created: 2020-08-19 08:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f11236e96e14b096d66afe9f3f8d442 SHA-1: d64c58c5e62689d9c02fde8ba5e07b5d3e3e7b2e SHA-256: f6384820e3bacae12e58fb75fecac0c87b59b5ed82fc1479ddec6c313c9ddebd
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). This indicates an attempt to direct users to malicious content or phishing pages. The document body, though heavily obfuscated, contains references to 'boyce avenue cover collaborations' and the redirector URL, suggesting a lure to disguise the malicious intent. The presence of numerous links to external PDFs, including benign ones on Shopify, is characteristic of SEO link farm techniques used to obscure malicious redirects.

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.cc/pify?keyword=boyce+avenue+cover+collaborations
    • http://files.mediumsarahlemos.com/uploads/1/3/0/7/130775046/rasoxetipuloma.pdf
    • http://jelisav.ibrahimsaidceramic.com/uploads/1/3/1/6/131606349/xosokonirokonelukedu.pdf
    • http://files.whooshflashcards.co.uk/uploads/1/3/1/8/131871587/gosapawezajos.pdf
    • http://files.hancockleadership.org/uploads/1/3/0/7/130738821/banujupafalosov_wekaku_zanidugo_menam.pdf
    • https://cdn.shopify.com/s/files/1/0430/0262/6202/files/31980360087.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/microbiology_virology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0461/4733/8403/files/42020752896.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/saxudopafajaxeluzixikifu.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/rabax.pdf
    • https://cdn.shopify.com/s/files/1/0447/4057/5386/files/jigalide.pdf
    • https://cdn.shopify.com/s/files/1/0435/6122/2307/files/cek_plagiarisme.pdf
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/byung_chul_han_burnout_society_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/puranufisoxiko.pdf
    • https://cdn.shopify.com/s/files/1/0431/6351/7092/files/kugapu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/46975582918.pdf
    • https://cdn.shopify.com/s/files/1/0431/7793/5004/files/fozidaxoxujigutabefo.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_off00004945.bin
8a6f5823a0362b62a0b33ebeee5d1b67779bbf1bf25a2107b7c306748591ff21
pdf-font-stream PDF embedded font (sfnt) at offset 0x4945 5144 bytes
font_01_sfnt_off00005ad7.bin
b24829a4fd32ba234f363f94239dadc2f465b59b80a9e52e5f4d4c31580c436a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD7 8952 bytes