Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cf20b7e3f3a6431…

MALICIOUS

PDF

66.4 KB Created: 2020-08-08 22:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7113efa31a4845d32243a10357382ff5 SHA-1: c466930b845fc2b9f39c60ba230464cb94abcc4b SHA-256: 8cf20b7e3f3a6431dc6ec0cb0372ba07b9b0130ac513e7c6fd5ac83bd76bcee2
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=adcom+gtp+500+manual+pdf', which is flagged as a malicious redirector. The document body appears to be largely obfuscated or corrupted, but the presence of numerous links strongly suggests a phishing or malware distribution attempt.

Heuristics 3

  • 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.
  • 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=adcom+gtp+500+manual+pdf
    • http://fepirebi.flourishinpurpose.com/uploads/1/3/2/6/132681670/e4a98600e2.pdf
    • http://tudim.standrewshenderson.com/uploads/1/3/1/4/131407406/7495161.pdf
    • http://files.ricky-liquor.com/uploads/1/3/0/7/130775658/noforawafowu_risukiw_zowul.pdf
    • http://files.kskydonner.com/uploads/1/3/1/3/131378990/bc03563c.pdf
    • http://files.bynancyohare.com/uploads/1/3/2/7/132712358/9164b48.pdf
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/69373248823.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/nuxujajefiref.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2304/files/pubevugotevegur.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/puzanupijutan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9671/1069/files/animals_worksheets_for_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/59146683857.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3527/files/watuwapagikigujagabeta.pdf
    • https://cdn.shopify.com/s/files/1/0435/6338/4991/files/97365664668.pdf
    • https://cdn.shopify.com/s/files/1/0433/0432/1184/files/musedibarifugapunumos.pdf
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/contemporary_communication_systems_mesiya.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/5457450961.pdf
    • https://cdn.shopify.com/s/files/1/0427/8714/3839/files/90545523720.pdf
    • https://cdn.shopify.com/s/files/1/0433/0956/4064/files/harbor_freight_snow_blower.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/foxopufigaxigagowirus.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_off0000c4ae.bin
2a06765501d1e2dac83dc30ef4b0d56c45b4e8b69db5916f64b9e6fde408953f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC4AE 5456 bytes
font_01_sfnt_off0000d73c.bin
ed1adca1a6dc7c219e0f2642839b037906ffc27bddb806945ce6792cb78e35ac
pdf-font-stream PDF embedded font (sfnt) at offset 0xD73C 10900 bytes