Malicious PDF — malware analysis report

Static analysis result for SHA-256 676b01f4a9b33562…

MALICIOUS

PDF

41.0 KB Created: 2020-08-03 10:30:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b5c4c9293b1a0d780e9ff1d990f3756 SHA-1: 90098dc23e5cdef5756bb7788af93c651798e9bd SHA-256: 676b01f4a9b335620f3d8471a0ad071140d6dbc0e35a5a8cf1ed269e7208213a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous embedded URLs, many pointing to Shopify, likely for SEO manipulation or to host further malicious content. One critical heuristic identified a redirector link to 'ttraff.ru' which is known malicious infrastructure. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to lure users into clicking it. No scripts were extracted from this sample.

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.ru/pify?keyword=marine+corps+drill+and+ceremonies+manual
    • http://files.bevilacquaguitars.com/uploads/1/3/0/8/130813054/6ce3593cb6ef653.pdf
    • http://files.bakedwithhearts.com/uploads/1/3/0/9/130969461/8cd32.pdf
    • http://files.authormelaniejames.com/uploads/1/3/1/3/131378990/8699926.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/1139/1135/files/xafezozina.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/21891785260.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/5274461667.pdf
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/applied_nonlinear_control_slotine_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/5555/4458/files/zapevefesozixede.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riwemabosemuridaredexe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0749/0717/files/jegowekewaveludizobupo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/notebook_hindi_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/40770646806.pdf
    • https://cdn.shopify.com/s/files/1/0435/2026/2308/files/28807524461.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/xixavo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4949/9289/files/wifaxakobikeduboboxonije.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lagikemirulufuwetore.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rodupenewizaf.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_off000056bc.bin
11d7c17fda11b36c02fbb46989c8d3769e3ea010abefdcb93fba190dc5d3260c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BC 5028 bytes
font_01_sfnt_off000067a7.bin
652aca84f4713344ced414432f39caa96fb362a06d3a8ea910efe5b8784b3bb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A7 9672 bytes
font_02_sfnt_off000088d2.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D2 4324 bytes

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