Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eaab2f7f8828bbc…

MALICIOUS

PDF

45.1 KB Created: 2020-08-20 09:41:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc95bf21de763459c9be88b96e2cc217 SHA-1: fe60708ee4b0d19402d89b4c5275ec1146af56d2 SHA-256: 9eaab2f7f8828bbc1b4116674c9d33d416ce73e473fbccdcfd6e3be2d3cad09e
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a link farm with 16 external PDF links. One of these links, 'https://ttraff.cc/pify?keyword=asseoir+command+form', points to a known malicious redirector. The document body contains garbled text but also includes the same redirector URL and several Shopify-hosted PDF links, suggesting a coordinated effort to distribute malicious content or phish users. No scripts were extracted, but the presence of the redirector and link farm strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=asseoir+command+form
    • http://files.misohandmade.com/uploads/1/3/2/6/132695519/f6b208f9cd.pdf
    • http://buxitisow.stmaryslibrary.org/uploads/1/3/0/8/130813714/wotakatanosaze.pdf
    • http://fakeni.oaklandbujinkan.com/uploads/1/3/1/4/131408854/wuduxani_nosufadi_dajokapo_dukal.pdf
    • http://files.moenada.com/uploads/1/3/0/7/130775728/pipedopijax-zinoronemoleval-ripeb-widero.pdf
    • http://files.newrtac.org/uploads/1/3/2/3/132302802/14a94c9601c5.pdf
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/65771366142.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/nanezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/8885/5718/files/videnida.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/89841887669.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/timonobafobifojabizididi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/gitiwitorevik.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/microscopic_hematuria_aua_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/bidetenegaxexu.pdf
    • https://cdn.shopify.com/s/files/1/0446/8034/7801/files/kinajavinaluz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/namekoritatarotogesososuw.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/7950267915.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058c0.bin
813b4d09d02b608e02fed61c565433f1c195b203d5b55764fed1215f0a2b680e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C0 3428 bytes
font_01_sfnt_off000064fb.bin
16edd05c58de94f69d3f965e2b38b31775381445a9d86cc3dccfe0a188be685a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64FB 5124 bytes
font_02_sfnt_off00007642.bin
f73f5254e6f37498199cfe82ec9b8f679c1810ab38aa67226f9e9559c5b7aaa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7642 15736 bytes

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