Malicious PDF — malware analysis report

Static analysis result for SHA-256 d584838cdeb53f4d…

MALICIOUS

PDF

32.2 KB Created: 2020-08-18 15:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6416fb77fd2bb48d2c27a647244706e8 SHA-1: f586dd94fed8e5c1d29be2213c70011192a58958 SHA-256: d584838cdeb53f4de97fce8de145a948be5b94c60a7925154a72239c1b460c4a
120 Risk Score

Malware Insights

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

The PDF contains a deceptive title suggesting quiz answers, but the primary heuristic indicates it's a malicious redirector. The embedded URL `https://ttraff.cc/pify?keyword=arrangement+of+electrons+in+atoms+quiz+answers` is flagged as malicious. Additionally, the PDF hosts a link farm pointing to numerous other PDFs, likely for SEO manipulation or to obscure malicious intent. No scripts were extracted from this sample.

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=arrangement+of+electrons+in+atoms+quiz+answers
    • http://gegejew.redtreefarmstead.com/uploads/1/3/0/7/130739048/nebulox-gafokafat-dasoneravas-mezixipuduvotal.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/aqa_sociology_a_level_textbook_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/6350/0197/files/68030056130.pdf
    • https://cdn.shopify.com/s/files/1/0436/5733/0853/files/4370053191.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/zufumofopasanogijifuro.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/bug_bounty_hunting_methodology_v2.pdf
    • https://cdn.shopify.com/s/files/1/0436/0863/7602/files/penuguwubinijegoxa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8246/4928/files/kirelejarorifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8483/1125/files/36500284584.pdf
    • https://cdn.shopify.com/s/files/1/0439/4981/8024/files/tenunipuvefuwusebowi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/im_a_believer.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_off00004222.bin
dbe00484dd82a2671a743a48e03c182e28a0b18c16458ed022d5910c199aca10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4222 5456 bytes
font_01_sfnt_off000054b5.bin
595a11c1090035335dba868d7b43753f54d0db17ad459c5437784a6e045d8f78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B5 9168 bytes

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