Malicious PDF — malware analysis report

Static analysis result for SHA-256 407e12bdb40c3cfd…

MALICIOUS

PDF

39.5 KB Created: 2020-08-31 20:32:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84dc6499e7fb0414106676c48e437a91 SHA-1: 7cb1f2b6142b83580711decfecf42adbf7e52605 SHA-256: 407e12bdb40c3cfdb93c6683d7660411ca9225e853ec6cf2517e0a59d1ac31ce
128 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic identified a malicious redirector link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains references to 'cccam to oscam converter apk' and the malicious URL, suggesting a lure to download potentially malicious software. The presence of a 'download button' heuristic further supports this phishing-like lure.

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/wix?keyword=cccam+to+oscam+converter+apk
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/zidebevibenilutusa.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/addition_and_subtraction_worksheets_grade_6.pdf
    • https://cdn.shopify.com/s/files/1/0434/7576/3353/files/fimisume.pdf
    • https://static.usrfiles.com/ugd/b8c837_404c24a989354ec29ef1d2ea9a374377.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_86f9e5a8c9714277b54091d01debbf76.pdf
    • https://static.usrfiles.com/ugd/1f6d71_45a7feb035644b94a9b07c9a962d69c8.pdf
    • https://static.usrfiles.com/ugd/6cfc61_f444c54c9a024390b1e68c35bb30adae.pdf
    • https://static.usrfiles.com/ugd/b8c837_dff7c2f01dfb49fc867614780af3b1a9.pdf
    • https://cdn.shopify.com/s/files/1/0438/1710/7616/files/entrepreneur_magazine_january_2018.pdf
    • https://cdn.shopify.com/s/files/1/0432/3573/7764/files/dovubanasireze.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5340/files/kepunivuguganabeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/3041/2450/files/83255589330.pdf
    • https://cdn.shopify.com/s/files/1/0434/6462/2246/files/kadepebusefakemomev.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/1577025978.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94448736580.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_off00005bf8.bin
6317d292523b8e9ed1bb8703ee1f69801cc84b958d28763810659f84510b4aa9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF8 5076 bytes
font_01_sfnt_off00006d29.bin
9a13804dc3d5f895575316361f81a926acf866982bf2bf05d9d0b886c51dfa46
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D29 10800 bytes