Malicious PDF — malware analysis report

Static analysis result for SHA-256 91def4291182c0a6…

MALICIOUS

PDF

38.5 KB Created: 2020-08-24 00:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fec105d40332dd1c9239370852655cec SHA-1: 9d86f57f72ffe7aa6d65bd84cdf69f0437ea1fe6 SHA-256: 91def4291182c0a6238aae679def44ae8df8aa2bc09ea6f8df5de9283e418880
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to redirect users to malicious infrastructure. Specifically, the URL https://ttraff.cc/pify?keyword=capricho+arabe+free+sheet+music+guitar is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for free sheet music. The presence of numerous external PDF links further supports the link farm heuristic.

Heuristics 3

  • 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.
  • 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=capricho+arabe+free+sheet+music+guitar
    • http://files.litatrimmingsphotography.com/uploads/1/3/0/7/130739120/75b3beab6791.pdf
    • http://wogojej.pizzamovers.net/uploads/1/3/1/6/131606457/173182.pdf
    • http://files.chippewakeryx.org/uploads/1/3/1/6/131606854/f98083d8dcc.pdf
    • http://laduk.jonrawlingspottery.com/uploads/1/3/1/4/131483167/5455588.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/4250316232.pdf
    • https://cdn.shopify.com/s/files/1/0431/3818/7413/files/xliii_roman_numerals.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0924/files/27263869908.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zorosibal.pdf
    • https://cdn.shopify.com/s/files/1/0429/2100/1119/files/12234502021.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0865/files/dijisunoxofugovunulavep.pdf
    • https://cdn.shopify.com/s/files/1/0430/3909/6986/files/67119965478.pdf
    • https://cdn.shopify.com/s/files/1/0433/8004/8023/files/wijaxavevamunatomadopupim.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/ebmt_guidelines_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/4553/6419/files/youth_competition_cheer_uniforms.pdf
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/gaxorefunirakukisijipevu.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_off00005545.bin
02fac8f3f76df4a9de34f61988febd92d6f2c8cdc71c4678442cfbb02f4f989d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5545 5440 bytes
font_01_sfnt_off000067a6.bin
26cb728a26fe13e182c4ffe161df186be92ed1383097c931975f6b319b99f7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A6 12904 bytes

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