Malicious PDF — malware analysis report

Static analysis result for SHA-256 56afea3cf9bb1a99…

MALICIOUS

PDF

44.1 KB Created: 2020-08-05 04:41:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 741f3685e9c0a79538d953173c357151 SHA-1: a5882a12c5553cd11a201ded90b74c0d60f48d44 SHA-256: 56afea3cf9bb1a99e74440369c5ddbe3eb5b908a1c1802dae81488eddbb8c93a
120 Risk Score

Malware Insights

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

The PDF document contains a malicious redirector link disguised as a free book download, which is a common social engineering tactic. The document body and embedded URLs indicate a lure to download potentially malicious content. The primary malicious IOC is the redirector URL.

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.ru/pify?keyword=books+for+computer+science+pdf+free+download
    • http://files.kinbasketlakeresort.com/uploads/1/3/1/1/131163578/womemede-rizevu-zuram.pdf
    • http://files.tomsaundersart.com/uploads/1/3/1/0/131071067/1757720.pdf
    • http://files.risingnorthproperties.com/uploads/1/3/1/4/131407051/3233322.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4154/files/65520248367.pdf
    • https://cdn.shopify.com/s/files/1/0433/7755/7660/files/40831334192.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0426/files/49719971973.pdf
    • https://cdn.shopify.com/s/files/1/0430/9159/1321/files/d_d_monster_manual_2.pdf
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/gidunexubopug.pdf
    • https://cdn.shopify.com/s/files/1/0438/3725/9938/files/3094168792.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7275/files/xexujubosevedirozise.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rixaraxamixenapo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9892/2403/files/ropupamolulobigij.pdf
    • https://cdn.shopify.com/s/files/1/0431/9910/3136/files/jazilerarakibuguvarizi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/69493578814.pdf
    • https://cdn.shopify.com/s/files/1/0428/1512/7708/files/ffv_job_planning_guide.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_off00006e09.bin
0d08fd4fe22d6bc15ae63a60862a2ca14ae583fb1c73e3ed870d80f98b2a5b29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E09 5504 bytes
font_01_sfnt_off000080c3.bin
0ff4dbf4daf371b5f87fe4c4d8260eff17dcdd7659b1942061bf84587048430e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80C3 9996 bytes

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