Malicious PDF — malware analysis report

Static analysis result for SHA-256 2479a001a43467e0…

MALICIOUS

PDF

32.4 KB Created: 2020-09-17 22:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97138723a8a4ab2e477c5a71f83873ce SHA-1: d048fa40c07d17c5bdb79336655e7f7a985eb380 SHA-256: 2479a001a43467e01e9899bac7a06b2168cfe62a4f1058a7b077db37158fc49f
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'math perplexors level d answers' and a URL pointing to a redirector. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute malicious content. The primary malicious URL identified is https://ttraff.me/wix?keyword=math+perplexors+level+d+answers.

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.me/wix?keyword=math+perplexors+level+d+answers
    • http://titev.researchingthewest.com/uploads/1/3/0/8/130814873/4769bd4a12.pdf
    • http://fikebub.kuchamberfestival.com/uploads/1/3/1/4/131437987/6e2bac72a53ea2.pdf
    • http://files.schoolofmythsanddreams.com/uploads/1/3/0/7/130776757/c79d426a0558.pdf
    • https://cdn.shopify.com/s/files/1/0436/0847/3763/files/sindoor_tere_naam_ka_episode_guide.pdf
    • https://cdn.shopify.com/s/files/1/0440/2987/0230/files/history_of_english_literature_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0770/3201/files/dupinigo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/mathematical_reasoning_questions_for_jee_mains.pdf
    • https://cdn.shopify.com/s/files/1/0440/1355/1774/files/wugamojobomisut.pdf
    • https://cdn.shopify.com/s/files/1/0464/5286/7240/files/game_campus_life_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3770/4867/files/dajokepav.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7181/files/eye_of_the_world.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_off00004338.bin
ed9ea5188a0db72e070fa919f29372e0e20d181b12a82f9c9270c15622f89f1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4338 5272 bytes
font_01_sfnt_off0000553b.bin
48f3e3df35302c43758279eaf34791936cad77c6b088a261c7006d38cc8061de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x553B 9384 bytes

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