Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3a8098ab11dca76…

MALICIOUS

PDF

41.1 KB Created: 2020-08-16 21:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7bfb29b4dc618bfddb96f67baf65bd3a SHA-1: 593f9e251f23e223775139c1bdba883f4e771011 SHA-256: c3a8098ab11dca761fd9ea8e4c95b40f0aa6debb619ff47628ad7587c55220ae
128 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to domains associated with link farms and redirectors, including a critical finding for PDF_MALICIOUS_REDIRECTOR_LINK. The document body text and embedded links suggest a lure for free software, specifically a 'collage maker', which is a common tactic to entice users to click malicious links. The presence of a visual download button further supports this social engineering approach.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=collage+maker+for+windows+free
    • http://vuzuboseg.redsquirrelconservation.ca/uploads/1/3/0/7/130776046/nopizesinim_gizisixenaf_lepamurifike.pdf
    • http://kasene.brittneynicolefloristry.com/uploads/1/3/2/6/132682883/40eae4ae42.pdf
    • http://juvopog.winstonheinrichs.com/uploads/1/3/1/3/131397970/4869554.pdf
    • http://files.3plids.com/uploads/1/3/1/4/131453156/816610.pdf
    • http://mefamo.tagis.pt/uploads/1/3/0/7/130776008/3efcc40.pdf
    • https://cdn.shopify.com/s/files/1/0433/1149/7366/files/bujanoribipezikaxuwi.pdf
    • https://cdn.shopify.com/s/files/1/0447/7632/5286/files/wojukuguw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0496/6565/files/microelectronic_circuits_6th_edition_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/silk_browser_app_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/9275/4080/files/dozilapilesebozurigam.pdf
    • https://cdn.shopify.com/s/files/1/0429/6078/1465/files/28315982464.pdf
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/90173750316.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_off000062c0.bin
c01796e47b3f0a549541dcc484b736b964ea32e9c521a7e0a1b0baf0d14d36d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C0 5288 bytes
font_01_sfnt_off000074bd.bin
7570a57e0d0d697863f829747e527dbeafbfdfda4e09b196167d929bbe5d3f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74BD 10256 bytes

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