Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdd2d5b5482f367…

MALICIOUS

PDF

45.7 KB Created: 2020-09-01 05:46:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6a4b08c829e7fdcd82524b3638d2b3f SHA-1: bad416e08725579a84f20a7842071f2beb63f1ab SHA-256: 7fdd2d5b5482f3673a7ecb0aeaecb046c10947690d8d90380cc0265fa506b79a
150 Risk Score

Malware Insights

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

The PDF contains a prominent link to a known malicious redirector, ttraff.ru, disguised as nutritional information for Starbucks' pumpkin spice. This suggests a phishing or scam attempt to direct users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.ru/wix?keyword=starbucks+pumpkin+spice+nutrition+information
    • https://cdn.shopify.com/s/files/1/0437/6517/0334/files/perito_en_lunas.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9507/files/58365494873.pdf
    • https://cdn.shopify.com/s/files/1/0432/4674/7805/files/8608229295.pdf
    • https://cdn.shopify.com/s/files/1/0462/9538/4225/files/scale_calibration_certificate_template.pdf
    • https://static.usrfiles.com/ugd/b8c837_60243c40796a47ada54802728d76e76d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1868644f22254e8fa3d860ac5f3c841c.pdf
    • https://static.usrfiles.com/ugd/c12414_9ec2fc733a4647e69ed387a92716e40e.pdf
    • https://static.usrfiles.com/ugd/5926b4_08178ac2558f41a4a6cdda2e197a3c62.pdf
    • https://cdn.shopify.com/s/files/1/0432/5690/5885/files/maxune.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/78916440267.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/sample_resume_cover_letter_format.pdf
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/tisagak.pdf
    • https://cdn.shopify.com/s/files/1/0428/1778/1927/files/87400785677.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/4002/files/istvan_banyai_rezoom.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/xorosixozunigabanaga.pdf
    • https://cdn.shopify.com/s/files/1/0432/9557/2126/files/4241298403.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000650a.bin
1036fa69a0d2ae104ff5d4fd87571acaee16dc8704c08568028b9f979009543f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5320 bytes
font_01_sfnt_off00007704.bin
29d206b7b8ac3289d1acb349c4d36bc935e320d5e53188c25f608abc58952a92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 10672 bytes
font_02_sfnt_off00009b61.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B61 4324 bytes

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