Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d567357cf9b556…

MALICIOUS

PDF

49.8 KB Created: 2020-08-30 06:11:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c594f63d4a31178de20e7f09f1213da SHA-1: 7dd1fe7bb5073ca333e409e4b27a5f8c431abf8d SHA-256: d4d567357cf9b5563597416ad220225c99af26510167c0314dd20663cf7b54ec
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifying a link to ttraff.com, a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a mass of external PDF links, suggesting a link farm or SEO poisoning tactic. The ML_NYX_PDF_MALICIOUS model also flagged this PDF with high confidence. No scripts were extracted from this sample.

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=harvest+moon+save+the+homeland+ps2
    • https://static.usrfiles.com/ugd/b8c837_9f8e99e0d2064a16a84b997467f63680.pdf
    • https://static.usrfiles.com/ugd/b8c837_246c0046a4ab40f8b875618f3232a841.pdf
    • https://static.usrfiles.com/ugd/b8c837_7155f7c6b781428d89e675d6822e7004.pdf
    • https://static.usrfiles.com/ugd/c5d40f_ff665abce44e41b387f02bfb4063203b.pdf
    • https://static.usrfiles.com/ugd/90c678_97d902c22bb14930a82511b18c36dc17.pdf
    • https://cdn.shopify.com/s/files/1/0437/7916/2263/files/clave_de_producto_microsoft_office_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/5294/7873/files/tedomivewipojuvivironimon.pdf
    • https://cdn.shopify.com/s/files/1/0468/9965/8914/files/xanilumamazu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/php_form_mail_scripts.pdf
    • https://static.usrfiles.com/ugd/3f4b99_bc7a1a49004949a5b2fe6f27e764028b.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbaaeef765e44aec8c019e6d1b63adac.pdf
    • https://static.usrfiles.com/ugd/b8c837_92bea7a586fd4e00a08e629d2fab10a1.pdf
    • https://static.usrfiles.com/ugd/cac9e4_b4bd9cf598bf4867a18807b8c85d298b.pdf
    • https://static.usrfiles.com/ugd/b8c837_39521c72e508469eb1881f03761e2d75.pdf
    • https://static.usrfiles.com/ugd/eb4c03_b39b149c2ae849b58162e1152ba83cdd.pdf
    • https://static.usrfiles.com/ugd/b8c837_66510327cdb34ea39dd840bf1933f4ff.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_off00006dd8.bin
7e804cf107cb7ae7b80b30ac8024bf6fab82b9f87f195632e365c96668c7798b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 6668 bytes
font_01_sfnt_off000084c2.bin
32239f2eba6ff8b35fc48c1ab53af826ce2872e6c3ed6eb39f4a92cc6913211a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84C2 5352 bytes
font_02_sfnt_off000096c8.bin
4dd0ab2176e99cf9059221abcb6998d662057bb600477a63f5d0368c57d65345		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 10064 bytes

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