Malicious PDF — malware analysis report

Static analysis result for SHA-256 b10268a7b1b5c60f…

MALICIOUS

PDF

32.5 KB Created: 2020-08-30 10:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a899d80b31f712e55a9fd7d4621001fd SHA-1: e1d518b3d2f6f04e6cccdd6458ebcf19a12524b2 SHA-256: b10268a7b1b5c60f577b8dd33118c5436d73f9726c905bcf428dd698bfa7e26c
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a high number of embedded links, many of which point to external PDF files. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which likely serves as the initial lure. The document body contains garbled text but includes the same suspicious URL, suggesting an attempt to disguise or obfuscate the malicious intent. The presence of numerous external links points towards a link farm or SEO manipulation tactic, potentially leading to further malicious activity.

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/wix?keyword=touching+spirit+bear+chapter+questio
    • https://static.usrfiles.com/ugd/b8c837_5a77fbba861a436f9ccbe225fd91bce4.pdf
    • https://static.usrfiles.com/ugd/87d215_1734ca82ca2c4893b85bf5dab43d6200.pdf
    • https://static.usrfiles.com/ugd/b98abb_b796d9ee1a7d4fd1921ef91a28f1e25b.pdf
    • https://cdn.shopify.com/s/files/1/0433/4711/6197/files/gilitevome.pdf
    • https://cdn.shopify.com/s/files/1/0433/6038/7227/files/31561770268.pdf
    • https://cdn.shopify.com/s/files/1/0438/3473/6797/files/basic_terms_of_share_market.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/que_es_el_sedentarismo.pdf
    • https://static.usrfiles.com/ugd/e2b09b_5baa3be97752443f88b549a79f4532d1.pdf
    • https://static.usrfiles.com/ugd/9c43ec_becd39dd89a347538d32df3b1e95f5a7.pdf
    • https://static.usrfiles.com/ugd/8ab72e_83b9d28051254ab894d49bf1e8f94bcc.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/ranodefeja.pdf
    • https://cdn.shopify.com/s/files/1/0460/1384/1567/files/fadovitanelelibifikevat.pdf
    • https://cdn.shopify.com/s/files/1/0432/2436/7262/files/mawurej.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_off000042a7.bin
c7a7c03875b92bd8b9617f04098875b95d2f7b45e7819ee4e080272f0a4d9741		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42A7 5376 bytes
font_01_sfnt_off000054e1.bin
432fa7fdf429fcf6c23795cf4d267ae76ea4b9cd5bdcfd544e57374ac8181bd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E1 9476 bytes

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