Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dcf0c9b9acbd23f…

MALICIOUS

PDF

42.5 KB Created: 2020-09-05 19:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a951185880fd645873a96d6e1317eef0 SHA-1: 6914f03f8767d15f84d1c023d7cb7df2bdd02f78 SHA-256: 4dcf0c9b9acbd23f0107781d1deaec32847338f0dc9109b852575d745903ace5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.club' with a keyword suggesting a lure for an IKEA catalogue. The document body, though heavily obfuscated, contains fragments of this URL and other benign-looking PDF links. The presence of a PDF link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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.club/pify?keyword=ikea+canada+catalogue+2014+pdf
    • https://static.usrfiles.com/ugd/8e7730_0ff60b86c7c6461582a3b85cf3f656df.pdf
    • https://static.usrfiles.com/ugd/b8c837_671c8c852bd8412b8eb3fa29d4ddc315.pdf
    • https://static.usrfiles.com/ugd/112488_97b6ee43579c43b9a29848bce4e26480.pdf
    • https://static.usrfiles.com/ugd/9734e7_6b6330f8d68f4a00a7b85d389671b5a6.pdf
    • https://cdn.shopify.com/s/files/1/0438/2782/2749/files/33227979208.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/depumemirotarisewo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/29915329964.pdf
    • https://cdn.shopify.com/s/files/1/0437/9521/8594/files/data_center_migration_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/0378/8959/files/principles_of_econometrics_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/9107/3947/files/47363986355.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fesitoxerevujadutag.pdf
    • https://cdn.shopify.com/s/files/1/0437/6926/6333/files/persuasive_writing_worksheets_5th_grade.pdf
    • https://static.usrfiles.com/ugd/c0a468_6873e44150c04345a38cb47c89260a72.pdf
    • https://static.usrfiles.com/ugd/12f4eb_9d2086ad07dd47009c2f0b22bc8d77e0.pdf
    • https://static.usrfiles.com/ugd/6da380_1c9e2bd4df644fe2a879d6b78cea8b72.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_off000065db.bin
5719c24f77eb98780f831baedc117ff1b7fbcb90c63456d7be0653319299c7cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65DB 5464 bytes
font_01_sfnt_off000078a2.bin
d0f7ca11377fa9300fdd29d86de3344a0408ce35672866c1012f4bb8e78c825a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78A2 10580 bytes

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