Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16e5a8cab525535…

MALICIOUS

PDF

44.7 KB Created: 2020-09-04 08:33:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00d088d8e4cf94637c34f7deb1ad4962 SHA-1: 3fa4bd21613fadd03194c2096f1130903e81f9b1 SHA-256: f16e5a8cab525535edc5b402d36668c334548d0328203ebea32b3b1357d70c89
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one to a known malicious redirector. The document body, though heavily obfuscated, contains text related to educational worksheets and the malicious URL. The primary attack vector appears to be luring the user to the 'ttraff.me' domain via a link disguised as educational 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.me/wix?keyword=addition+and+subtraction+worksheets+to+10000
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/46189599617.pdf
    • https://cdn.shopify.com/s/files/1/0437/5383/2609/files/practice_it_answers_bjp4_self-_check.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/lagu_celengan_rindu_feby_nc.pdf
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/92887131934.pdf
    • https://static.usrfiles.com/ugd/b8c837_6065188ab8e34fb9ba84f9bcf177a299.pdf
    • https://static.usrfiles.com/ugd/cc089a_b7be4427c97a401bb74d9e4b12be7dee.pdf
    • https://cdn.shopify.com/s/files/1/0437/2683/1784/files/easy_riddles_with_answers_hard.pdf
    • https://cdn.shopify.com/s/files/1/0433/8666/7158/files/nuxotapefiro.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/31461779101.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/76581853150.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/your_love_brandon_heath.pdf
    • https://cdn.shopify.com/s/files/1/0463/5623/4406/files/vatsayana_kamasutra_positions.pdf
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/kovowogefesovemuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/ruzifiduxepinirag.pdf
    • https://cdn.shopify.com/s/files/1/0432/6984/9248/files/call_of_duty_free_for_macbook.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_off00006856.bin
224d08035c1c0a435818295e12a9c811190b29a49a7171c1dcb7f0d35c4a7a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6856 5472 bytes
font_01_sfnt_off00007b05.bin
5d79c2373be154c2dfb0580fbd1fa762ecc8b2617b928be8a2a738b1f4386423		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B05 14008 bytes

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