Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf5a8e0c3be80ff1…

MALICIOUS

PDF

57.0 KB Created: 2020-08-23 01:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66abf5d86d29dd0bafd072c3679e6234 SHA-1: 9ec3b1a6b276ab58d287760c50bb6b9d4cff3944 SHA-256: bf5a8e0c3be80ff1fb124c85f0a52ab3ac6d9622e0f6a3bc35e0cf3f957312bf
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.cc/pify?keyword=3d+printing+filament+guide+pdf', is designed to trick users into believing they are downloading a filament guide, but it actually leads to malicious infrastructure. The document body, though heavily obfuscated, contains references to the lure and 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.cc/pify?keyword=3d+printing+filament+guide+pdf
    • http://files.mothermoonwellness.com/uploads/1/3/1/6/131636725/milekafixevi_kugefet.pdf
    • http://files.coastnuflow.com.au/uploads/1/3/1/4/131483027/karunarufoluvov_wegopiraximero_detozopu_watakosoxuvo.pdf
    • http://nutuwopa.mcgrewwoodwork.com/uploads/1/3/1/4/131438563/4f09da.pdf
    • http://kotig.ubershrimp.com/uploads/1/3/0/8/130874049/mogej_ximuko_vegesogo_vemasigutef.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6923/files/69732935833.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8372/files/gakupipik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/32559566824.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/xugin.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8544/files/chemistry_final_exam_study_guide_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/2548852743.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4865/files/92376217407.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6727/files/napefego.pdf
    • https://cdn.shopify.com/s/files/1/0438/6773/4171/files/64342092039.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/norow.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/
    • https://cdn.shopify.com/s/file

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009398.bin
78218c13a14275e41ad0d9581bfef8f74aa91a7db112a7147aabb4d6be1bc187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9398 5024 bytes
font_01_sfnt_off0000a48b.bin
6314a41fa7f790e0fb7443271188491b679e8e9737dd7da093d1a25db6731ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA48B 10504 bytes
font_02_sfnt_off0000c878.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC878 4324 bytes

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