Malicious PDF — malware analysis report

Static analysis result for SHA-256 67134f6be9e39800…

MALICIOUS

PDF

39.3 KB Created: 2020-08-13 16:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ea7e9c0a4b612d02befe902c26c8d9 SHA-1: 266acf6a3f0ce2df5bd7d3619f043810db4ed7c7 SHA-256: 67134f6be9e398000207b79983c3b3d6818306bfcf979a5e03441c17e07f37e4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure for a 'Centerpoint crossbow owners manual'. The presence of a link farm suggests an attempt to drive traffic to malicious or SEO-manipulated content.

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/wb?keyword=centerpoint%20crossbow%20owners%20manual
    • http://luwutus.ellistrations.net/uploads/1/3/0/7/130739826/zoxurogasazafi.pdf
    • http://files.amboy.net/uploads/1/3/2/6/132695714/fudozafuxu.pdf
    • http://files.divideny.org/uploads/1/3/1/4/131406935/kilalazaze_xifinipu_semam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/8790/4422/files/25468080560.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tevedizulav.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/nijozik.pdf
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/xuvefonowavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35535883354.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/bojesukedusinudozukofavi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8626/files/995400796.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2677/files/emerson_microwave_parts.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/mosuvum.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/57189589950.pdf
    • https://cdn.shopify.com/s/files/1/0431/9494/1603/files/36658258458.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050af.bin
2d82ea20db54b7894b0fa11d64952bffaeab5367a10eb4aa48cad1b5808d4796
pdf-font-stream PDF embedded font (sfnt) at offset 0x50AF 5216 bytes
font_01_sfnt_off0000625c.bin
860f3c2a94584ccef76000c4eaec5936ac8ce05abf0ed1611a67b15915c5a776
pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 9404 bytes
font_02_sfnt_off0000823a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x823A 4324 bytes