Malicious PDF — malware analysis report

Static analysis result for SHA-256 cad455a045f54dda…

MALICIOUS

PDF

41.2 KB Created: 2020-08-13 01:07:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b9592fcce00197a68f944b81c0be9e5 SHA-1: a269e7d655a128aeac111597450d6d0346ce4c65 SHA-256: cad455a045f54ddab4f7a3e9f4c078d0a300b79faa0bfd1d15c2b878024a0b5c
128 Risk Score

Malware Insights

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

The PDF contains a call-to-action button and numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.cc/pify?keyword=bitmap+image+to+pdf+converter, which is likely intended to lead the user to a malicious site. The presence of many external PDF links suggests a link farm SEO tactic, potentially to improve search engine ranking for malicious content.

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.cc/pify?keyword=bitmap+image+to+pdf+converter
    • http://files.boldncreative.com/uploads/1/3/1/4/131407492/1310305.pdf
    • http://lesagotu.newcastledodgeball.com/uploads/1/3/0/7/130739860/linatijuro-vizenu-fonalip.pdf
    • http://tedemal.tisharichmond.com/uploads/1/3/1/1/131164250/kifug_rotepelesexuwox_datoxirisamete.pdf
    • https://cdn.shopify.com/s/files/1/0432/9416/3109/files/58075385070.pdf
    • https://cdn.shopify.com/s/files/1/0433/6533/5190/files/pogesagoxuram.pdf
    • https://cdn.shopify.com/s/files/1/0432/8911/6836/files/56009108745.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/gabovamitisudizo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/arenas_movedizas_libro_malin_persson.pdf
    • https://cdn.shopify.com/s/files/1/0436/4461/6864/files/because_vs_because_of_exercise.pdf
    • https://cdn.shopify.com/s/files/1/0432/6539/2803/files/97572702915.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/56646259366.pdf
    • https://cdn.shopify.com/s/files/1/0432/6244/3683/files/calf_muscle_exercises.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_off00005d32.bin
eaa81aa8410298ae04a8450448ea1fe6cc6416e88ccf9606b7b8525c1ac4fad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D32 5372 bytes
font_01_sfnt_off00006f67.bin
952a1584ef0b372dc03894428936a6765370e612f71ca1b3691a44a587a9830b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F67 15264 bytes

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