Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6a4ec8ce499726…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 01:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1467ba217d296465881f11e4eaad371d SHA-1: 15ea37a1592e38084860a97fdd34d2caaad895bd SHA-256: 3f6a4ec8ce49972669fe9c314c0a3d1f70d447e5b6741af50577ff4a3b7188a4
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text suggesting a lure for a 'frequently asked questions word template free'. The presence of a password-protected archive lure heuristic suggests this PDF is part of a multi-stage attack, likely to bypass gateway scanning. The primary malicious IOC is the redirector URL.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=frequently+asked+questions+word+template+free
    • http://jeburome.triciabutskiart.com/uploads/1/3/0/8/130874493/86f84dd98.pdf
    • http://nakodo.hollarchiropractic.com/uploads/1/3/0/7/130740592/9109201.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/gaxuzukabavavimamoletadud.pdf
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/avery_address_label_template_16_per_page.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1285/files/colour_blind_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/1652/7770/files/lopiruwirurupej.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/ffmpeg_mp4_to_wav.pdf
    • https://cdn.shopify.com/s/files/1/0440/4497/6278/files/malaruxasererinugakasepa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9522/files/fozomitidosojug.pdf
    • https://cdn.shopify.com/s/files/1/0428/5913/5132/files/fesisovesoxix.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_off000070e0.bin
87c499b84d8625a28416f55ab4c2f6aa52f5c601f7d81c4021050db665b99649		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70E0 5528 bytes
font_01_sfnt_off000083b2.bin
d3dd9aad72959e4c636524146dc0e35198e93d6b3a30574db53439acb1a05186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83B2 10548 bytes

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