Malicious PDF — malware analysis report

Static analysis result for SHA-256 2beb7c30002a7ccb…

MALICIOUS

PDF

36.5 KB Created: 2020-08-23 09:20:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c498973c545c0b3a251afb9f3e7bf82d SHA-1: 469eecca314f1cb48d7bbc9ca17bf9b1d985a795 SHA-256: 2beb7c30002a7ccb0a109397dabe0ab23ba85e3e2518740e0dfabf5b2c5dc654
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=cash+drawer+count+sheet+google+docs', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The presence of numerous other links to Shopify PDFs indicates a link farm strategy, likely to improve SEO for the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/pify?keyword=cash+drawer+count+sheet+google+docs
    • http://vagup.michiganeliterealty.com/uploads/1/3/1/4/131406665/farolabozomon-mobavebufir-suzema.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/horizons_etfs_management_canada_inc_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0434/8562/6520/files/translate_arabic_to_english_document.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/android_studio_load_apk_to_device.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9721/files/55370020174.pdf
    • https://cdn.shopify.com/s/files/1/0431/7757/4562/files/64720776348.pdf
    • https://cdn.shopify.com/s/files/1/0457/3685/3660/files/centaur_warchief_dota_2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/4491/2802/files/1451622714.pdf
    • https://cdn.shopify.com/s/files/1/0438/9827/3944/files/crying_behind_mask_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/2448/1431/files/assemblies_in_c.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_off00005122.bin
1f88bc452dc366313107779c0cb00dac1b8472a9563675f36d3adb07cc9eaf40
pdf-font-stream PDF embedded font (sfnt) at offset 0x5122 5200 bytes
font_01_sfnt_off000062d6.bin
d378425b17e2665b4c44f04e03344c7a17028b1d35da3e0a96fc0ec3a5b00c8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x62D6 10132 bytes