Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6985c597f0ae02…

MALICIOUS

PDF

38.1 KB Created: 2020-08-06 13:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44fe94081918c6d44882a1cda6646d43 SHA-1: f5cddb0ac3b4828b8dd599c569dce45effee9657 SHA-256: 4d6985c597f0ae023cf1f6020c2db2e400a4d1ef3967095949bf4756eee643f4
128 Risk Score

Malware Insights

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

The PDF file contains a prominent link presented as a download for 'Upsc mains answer sheet pdf download'. This link, identified as a malicious redirector, points to 'ttraff.cc'. The document also contains a large number of links to Shopify-hosted PDFs, likely for SEO manipulation to increase visibility. The presence of a call-to-action button further supports the malicious intent of luring users to click the link.

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=upsc+mains+answer+sheet+pdf+download
    • http://xuvemijis.divinesoulcenter.com/uploads/1/3/1/4/131453062/9741733.pdf
    • http://files.anakarylle.com/uploads/1/3/0/8/130874073/ketakizibagesipepoz.pdf
    • http://files.heavygrail.net/uploads/1/3/1/3/131380733/bitat.pdf
    • http://files.donahuesportsmens.com/uploads/1/3/0/8/130814581/9588380.pdf
    • http://files.sarahkramerharrison.net/uploads/1/3/1/4/131453132/6282998.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/taxonomie_van_bloom.pdf
    • https://cdn.shopify.com/s/files/1/0434/5528/3366/files/background-_size_css.pdf
    • https://cdn.shopify.com/s/files/1/0431/7118/4794/files/zoworebozap.pdf
    • https://cdn.shopify.com/s/files/1/0435/3864/5144/files/rivubejavedonuletakiti.pdf
    • https://cdn.shopify.com/s/files/1/0436/4104/5145/files/animals_for_kids_vocabulary.pdf
    • https://cdn.shopify.com/s/files/1/0438/2215/3890/files/vixogazegado.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/12136194426.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/82744748460.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xoperesotojazi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/search_inside_yourself.pdf
    • https://cdn.shopify.com/s/files/1/0450/2428/0726/files/daydream_believer_piano.pdf
    • https://cdn.shopify.com/s/files/1/0435/4670/6088/files/48640045596.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_off00005635.bin
7467113908fea57b320b04d3569cd6c77bfa0f8bc9a1b4517a565aefc66062c3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5635 5476 bytes
font_01_sfnt_off000068bc.bin
397d605f2153fb832cad7dd446f753d18e6e0a545c2978d25eb968bbe4b5ca73
pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 10220 bytes