Malicious PDF — malware analysis report

Static analysis result for SHA-256 98942e5bbd3acdfe…

MALICIOUS

PDF

36.7 KB Created: 2020-08-15 01:22:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d70b7a6c2d5cb30f191c2d603ef42f7 SHA-1: 2f01d2667d3c61cb79094d82acc6a470a4c37189 SHA-256: 98942e5bbd3acdfed41760f30feac803d0f97e6a040902c5d5795ea665598dd7
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, also contains this URL and appears to be a lure for 'microsoft publisher halloween flyer templates'. The presence of a link farm heuristic and numerous embedded URLs, many pointing to benign Shopify domains but some to unknown domains, further supports a malicious intent to redirect users. No scripts were extracted from this sample.

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=microsoft+publisher+halloween+flyer+templates
    • http://files.updatescentral.com/uploads/1/3/1/3/131384018/fotimiva_nidanu_gibuvidedavade.pdf
    • http://nugewuber.katebenderart.com/uploads/1/3/2/7/132712062/wufuzikuboxewotodop.pdf
    • http://files.dassiedahan-author.com/uploads/1/3/1/4/131436971/wixodasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3523/7269/files/djpunjab_punjabi_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/8297/1291/files/definition_of_scarcity.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/64657531190.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/augmenter_sa_confiance_en_soi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7791/7085/files/2d6_vs_1d12.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/fimalelan.pdf
    • https://cdn.shopify.com/s/files/1/0434/3015/0309/files/32031712442.pdf
    • https://cdn.shopify.com/s/files/1/0435/1583/8618/files/56835513362.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/57192356624.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/jujopemaxu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/answer_key_math_10_module_3.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_off000051b6.bin
1c32ac9202448f5999a38cbddfcc5a1d958672e79ae00cb8da1a72426593f58e
pdf-font-stream PDF embedded font (sfnt) at offset 0x51B6 5596 bytes
font_01_sfnt_off000064a3.bin
2e51ab94ffebc1fb97b9cf31599c0fc3231b692d03990583e93c8dcc601b029f
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 9720 bytes