Malicious PDF — malware analysis report

Static analysis result for SHA-256 af33d4c89dca762d…

MALICIOUS

PDF

39.4 KB Created: 2020-09-02 22:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc307fc2329686b2cfd8794662dd6a99 SHA-1: 7d3ff065889697b8e1454e11a797b3e48c59d25a SHA-256: af33d4c89dca762de6a9eb85850c0b1d963d8dea71585bcf971f6dc291b0e093
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=basara+2+heroes+apk+game'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The presence of a 'download button' lure further supports the malicious intent. 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.ru/wix?keyword=basara+2+heroes+apk+game
    • https://static.usrfiles.com/ugd/544c7e_449ec30e741e4b07ae8cc9eda33290c4.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_ac31415a8d514f5d891268a9c26abcf4.pdf
    • https://static.usrfiles.com/ugd/eaf48f_e0ab55a9773745bea5811c56b5245ba2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6108/3296/files/pedowosegoginiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/7960/5147/files/waltz_of_the_flowers_violin.pdf
    • https://cdn.shopify.com/s/files/1/0435/6734/9923/files/weather_report_bloomfield_ct.pdf
    • https://cdn.shopify.com/s/files/1/0468/8406/1341/files/daxodemubixa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4188/0224/files/53335205014.pdf
    • https://cdn.shopify.com/s/files/1/0436/9832/3609/files/begugugepozudo.pdf
    • https://cdn.shopify.com/s/files/1/0429/3571/3958/files/60498354674.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/57970771840.pdf
    • https://cdn.shopify.com/s/files/1/0439/3215/6059/files/vafamuvuwaxowetovorivava.pdf
    • https://cdn.shopify.com/s/files/1/0438/9568/5288/files/adobe_acrobat_xi_pro_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/av_block_ecg.pdf
    • https://cdn.shopify.com/s/files/1/0436/0467/2675/files/mother_darren_aronofsky.pdf
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/clear_guon_stone.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
font_00_sfnt_off00004e43.bin
da63074901d9479c5621471b4b36baf0938b60f8bf5b084790771a8184629d5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x4E43 5000 bytes
font_01_sfnt_off00005f3b.bin
f0ba7f5b798edc2c9e2e9c5cfcb3de4810f0323ce9a7ed899e1a8e6d47e54d62
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 10204 bytes
font_02_sfnt_off00008234.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 4324 bytes