Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e14ffb41faf328…

MALICIOUS

PDF

40.2 KB Created: 2020-08-29 18:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd964aca1fa3dbce150c8ed5d95d2611 SHA-1: 0229a7ab1a95e38917e17c4e7fc6be79675f96b3 SHA-256: 31e14ffb41faf32873779710a7bdd2e17c9aa87d5e85b87cb5b954bdc9b980e7
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary malicious URL being ttraff.com. The document body, though partially corrupted, contains the same URL, suggesting a lure for users to click on malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=rail+de+laplace+exercice+corrig%25C3%25A9
    • https://static.usrfiles.com/ugd/238140_4adea554daca4d85a55420562febecb5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a42262263df4cbd8bf878a3eda5f33c.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa232c00dec347458a860aaa1b17f07f.pdf
    • https://static.usrfiles.com/ugd/eb4c03_057f8c4f297d427aa24aafcf9f3db928.pdf
    • https://static.usrfiles.com/ugd/b8c837_e32663d164b94940a19c6eeb3fa24506.pdf
    • https://static.usrfiles.com/ugd/df4650_b0df7c4a9fdf4665a2fac6b5edbab0fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_e62cfd464b1a416fb85931d185a71ad7.pdf
    • https://static.usrfiles.com/ugd/516793_465c19d7e77b4460b2635684e298cd21.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed71f763ab1042cc98a3aa668a8935ae.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/wodepaturufajagodur.pdf
    • https://cdn.shopify.com/s/files/1/0450/0835/5486/files/97584169201.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_off00005ee0.bin
bde86d8466c580d66cddee1ca918704c900c2052e09e8103844de9b838d6c94a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE0 5280 bytes
font_01_sfnt_off000070a1.bin
a640950badb7968b04cf424faf3f2e5e3dadec33f9a2eafacf68bc87e16895ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 9788 bytes

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