Malicious PDF — malware analysis report

Static analysis result for SHA-256 5670b746b6f3ced0…

MALICIOUS

PDF

56.7 KB Created: 2020-08-09 09:36:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9706dd9b093f9b32a0d8d94eee6b3d22 SHA-1: df7df1a7c1bd9d634a1e8598dda0dfa3b1ec0c7d SHA-256: 5670b746b6f3ced079f16c69915d2e647760f6349e0cd3e7fda27538ee2c3cee
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, pointing to 'https://ttraff.ru/pify?keyword=download+dictionary+english+to+farsi+pdf'. Additionally, it exhibits a PDF link farm behavior, with numerous embedded URLs, many hosted on Shopify. The document body, though heavily corrupted, contains fragments of the malicious URL and a call-to-action phrase, suggesting a social engineering lure to download a file.

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=download+dictionary+english+to+farsi+pdf
    • http://files.ssc-life.com/uploads/1/3/1/8/131856170/7b78a.pdf
    • http://riwikuxe.allanmcintyrefineart.com/uploads/1/3/1/8/131871390/2795153.pdf
    • http://files.stpaulwp.org/uploads/1/3/1/1/131164176/wedunokafuveki.pdf
    • http://files.christianfellowshipind.org/uploads/1/3/1/4/131438604/sowerubatanatoti.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7184/files/nonorurituv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/55935119662.pdf
    • https://cdn.shopify.com/s/files/1/0435/6639/9647/files/resif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/98987935474.pdf
    • https://cdn.shopify.com/s/files/1/0432/6693/2902/files/62187070135.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/wipagigavaxise.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/64202766815.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1846/files/fabujuzijavubuxarirojol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0576/files/oral_candidiasis_case_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7913/files/28410762353.pdf
    • https://cdn.shopify.com/s/files/1/0428/2253/3276/files/velasuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/gutopenoxisominutajogal.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_006_off0000a7f7.bin
933670f76d9202ddcaf84da8d2cc42a2b21cc352ef7368eac3d3bc51d2091e83
decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA7F7 25264 bytes
font_00_sfnt_off000071d0.bin
9bc69de65e4c2fc2f1f8e2d95f80f5e3acb769baa2fee77f3ee54116dfeeeb7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71D0 5612 bytes
font_01_sfnt_off00008507.bin
8f68ca111efe72091399cf4a4bb9e73e2915fb305b80bd0c166d77bfacdcee5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8507 10128 bytes