Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef990c4f9a4f2878…

MALICIOUS

PDF

56.6 KB Created: 2020-08-08 18:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd460d3f289c6c11d8e71247c28d0f5c SHA-1: 88ac7ad25e4df842b17939d0a2ccc354c98318d1 SHA-256: ef990c4f9a4f2878914533ca6b00f5a7e500e7ce875bdd9ec4cb28873fdc1c2b
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains text related to a '6th pay commission report karnataka pdf', suggesting a lure. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains but some to unknown hosts. The primary malicious IOC is the redirector URL.

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=6th+pay+commission+report+karnataka+pdf
    • http://donizofom.eatyourpoem.com/uploads/1/3/2/6/132681670/c1515bf4.pdf
    • http://musiga.orijenniecosmetics.com/uploads/1/3/0/7/130738914/foseranafamob-jukelefu.pdf
    • http://pakigoj.slabhappyluress.com/uploads/1/3/0/8/130814297/5101875.pdf
    • http://files.loddoncommunitygym.com/uploads/1/3/2/3/132303035/1309173.pdf
    • https://cdn.shopify.com/s/files/1/0431/9258/2293/files/72787190837.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/rukivenas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0723/7531/files/nidoma.pdf
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/liligexilom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/calculus_and_analytic_geometry_by_swokowski.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/85807074315.pdf
    • https://cdn.shopify.com/s/files/1/0431/8943/6580/files/liriwerafa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2506/files/minecraft_attack_on_titan_mod.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/tony_robbins_business_mastery_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/bank_po_exam_self_study_guide_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/gamakitidalazotutedipejel.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/51361606819.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/rekuwaduvujivozowelowuvo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00007f10.bin
19435ac142cf8f239febd00ac3b00de47787e439194a6bd9b7c0ed745c651c07		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7F10 16028 bytes
font_00_sfnt_off00006c38.bin
2c2a4adfbf012a93448a1372a3a0489dc335ac26491c5ecf3971d6f8e013b21b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C38 5588 bytes
font_02_sfnt_off0000a430.bin
0a2038acc68429d17b1d80c0e63c8fadb54f1830c8e10bdc297642c3c093c7f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA430 14812 bytes

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