Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc2d3c9fba7476f…

MALICIOUS

PDF

64.7 KB Created: 2020-08-14 01:06:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86ee6b5c1ae8443914e017ebf6ff4fb SHA-1: 5d75c2991216ac2cce7a384839c56e75abf2b068 SHA-256: cbc2d3c9fba7476f31eb32ac9d9fbd55a1729cab475db781b21c794029f86d2c
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of an SEO link farm. The primary malicious URL, https://ttraff.cc/pify?keyword=multilayer+blown+film+extrusion+process+pdf, suggests a redirection to potentially harmful content. The document body contains garbled text along with several URLs, reinforcing the link farm and redirection attack pattern.

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.cc/pify?keyword=multilayer+blown+film+extrusion+process+pdf
    • http://fekuw.catalyst-now.com/uploads/1/3/1/0/131070722/luvojifadezu-rexujizit-mawoxexomono-rakubulig.pdf
    • http://files.leaguesforpickleball.com/uploads/1/3/2/6/132681647/fivowudajo.pdf
    • http://files.schoolforpoliticsandcritique.org/uploads/1/3/1/6/131637606/3617859.pdf
    • http://files.qualitytestinginc.com/uploads/1/3/1/8/131857270/vetukovugororul.pdf
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/gumazobidinefafakuzowam.pdf
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/learn_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0435/5280/0929/files/armor_of_god_bible_study_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/simple_present_tense_affirmative_negative_interrogative_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/85538627203.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/tupiruferukirinoboxek.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kepikopu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/walusilitebomodivamuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2229/3920/files/vanilla_wow_weaponsmith_recipes.pdf
    • https://cdn.shopify.com/s/files/1/0437/5235/8039/files/wotlk_skinning_guide.pdf
    • https://cdn.shopify.com/s/files/1/0439/2127/7096/files/ideology_meaning.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_off0000be59.bin
47f6df44f26abd86a6e5427abbea9ca46ed90ef2186b318f53fede67caacd65e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE59 5708 bytes
font_01_sfnt_off0000d1c6.bin
c6532b0ed58f24f9e660a919538fb6f0164b4807abbfa69941a0be2a68e7f901
pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C6 10488 bytes