Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6924ff004ea09f…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 06:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9bba6c871af61b70e7e633cae3c8b8f5 SHA-1: dfc57b42dcdd270f9014479ed5971a02fcc9c1f2 SHA-256: 3a6924ff004ea09f075063c4d10bed724118f71aea6eea7e7fc00dcf3ca62121
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This suggests a tactic to drive traffic to malicious infrastructure, potentially for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting the analysis of direct payload execution.

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=arquitecto+definicion+pdf
    • http://files.cgcatogo.com/uploads/1/3/0/9/130969801/rotoginibib-zubofemaf.pdf
    • http://files.brandiburgess.com/uploads/1/3/0/7/130775537/vokonos.pdf
    • http://tused.mailingctr.com/uploads/1/3/1/1/131164250/3302778.pdf
    • http://files.healthandfitnesswtea.com/uploads/1/3/0/7/130740069/delujuraro-dikis-rinixafikox-vominaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/gefekavedoxotesar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/mawesokofokajavagunu.pdf
    • https://cdn.shopify.com/s/files/1/0439/1724/6632/files/jewelcrafting_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1728/0408/files/97686327543.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/risperdal_davis_drug_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/kewijoduwigabitizip.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21800621301.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/58462911129.pdf
    • https://cdn.shopify.com/s/files/1/0435/2661/9288/files/guvogemopanu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6407/3128/files/74627459876.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_off00006126.bin
802ab8cca1d24d0b2c1aa3065a3273fcd7eb6c21dcb20ecc6778a256b4f853d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6126 4844 bytes
font_01_sfnt_off000071ae.bin
c48ebf2eeaf1340183897caec943afcec5a32292317f70a8de74cc853f98ef9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 11692 bytes

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