Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fde2d438ebf647f…

MALICIOUS

PDF

56.8 KB Created: 2020-08-10 10:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2dd0a163462015717d4af7ceaf31eda SHA-1: 3851c4534c6d628912d92406c11e2b1420d9d047 SHA-256: 1fde2d438ebf647f2c5042bf5b23d97923495d273a03ad4146790c1ef4578a55
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=effective+communication+journal+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of the malicious URL is sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=effective+communication+journal+pdf
    • http://pogiw.somersetstoneconservation.com/uploads/1/3/0/7/130775169/431423.pdf
    • http://files.chickwrestler.com/uploads/1/3/1/4/131413040/68907764.pdf
    • http://files.willardenvironmental.com/uploads/1/3/2/6/132681219/7879212.pdf
    • https://cdn.shopify.com/s/files/1/0432/9147/6133/files/yu_gi-_oh_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/82054894348.pdf
    • https://cdn.shopify.com/s/files/1/0427/6033/9623/files/77009114987.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/71255936841.pdf
    • https://cdn.shopify.com/s/files/1/0434/2772/5474/files/ronubutegixa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/7793481140.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/28901633027.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72518400380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70282461387.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/lilegamebuxatulexawasopu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6809/4629/files/ba_ii_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4048/0164/files/ruwikaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/93033410115.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_off00009fbb.bin
ce0c6a6ef607fc2fc941d3d37aef312a48e61a790c6c23910e11cedce0f62685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FBB 5216 bytes
font_01_sfnt_off0000b176.bin
e5b6080f705e4542349abfba3c4b47c1566f8c0c3b25bc09775e441eb335cb29		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB176 10644 bytes

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