Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c679d656fbc77f3…

MALICIOUS

PDF

37.0 KB Created: 2020-08-24 16:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9704e8aa0627ee6516eeaee7eea5aff3 SHA-1: 33a8f2bdb9f468fd3b615848d88ee6ec38b04361 SHA-256: 3c679d656fbc77f32f6a8bfa3a99f1062b7a5c8befcc5918e5d2b32f54e531bb
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document also contains a large number of links to other PDFs hosted on Shopify, likely as part of an SEO link farm to obscure the malicious redirector. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=guidelines+merriam+webster
    • http://files.trinitylutheranchurch.com/uploads/1/3/1/4/131483184/wawujipuk_sixudafovak.pdf
    • http://wodosu.mthopebaptist.org/uploads/1/3/1/3/131384714/tizuno.pdf
    • https://cdn.shopify.com/s/files/1/0431/2855/3634/files/saxophone_bebop_scales.pdf
    • https://cdn.shopify.com/s/files/1/0432/9524/4452/files/jazavikojubonofumomosovol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/make_your_own_handwriting_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/xupesonerojoxudurozuzif.pdf
    • https://cdn.shopify.com/s/files/1/0428/5674/3079/files/anatomy_of_nose_ppt_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/65973025333.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/lodiweribinolu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/bebe_rexha_meant_to_be.pdf
    • https://cdn.shopify.com/s/files/1/0429/6274/7548/files/wevarujowugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/form_8863_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0435/4611/6248/files/67680599735.pdf
    • https://cdn.shopify.com/s/files/1/0459/9126/4415/files/android_emulator_bluetooth_controller.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_off00005053.bin
ce31de1081e7942620e307eecb384fc717ae0a017d78d4cf3c04564b3fae3383		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5053 5236 bytes
font_01_sfnt_off0000620a.bin
0b3b8cb4f63b977d22a6a903bd68cf492645e43fcd8faf8f553e8c589a25ab24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x620A 11012 bytes

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