Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e9acfbcf113b8cd…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 14:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 17bc6bf713774379d482017397abaa5b SHA-1: c0a7659bd70f8e99387e7faf21b2fc2bd83350ef SHA-256: 3e9acfbcf113b8cd6970a704f68333b86a7223da85b5dee27443c000e7729503
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This indicates the document's primary purpose is to redirect users to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for the attack pattern.

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=intel+82566dc+2+gigabit+network+connection
    • https://static.usrfiles.com/ugd/5360f8_577115e00ded48379b3d8aa1c2d372da.pdf
    • https://static.usrfiles.com/ugd/b8c837_768799232fe64d4eb1ea42bf39b28721.pdf
    • https://static.usrfiles.com/ugd/7c3584_8bcffcfde72846f9a15adae44729c46a.pdf
    • https://cdn.shopify.com/s/files/1/0428/6251/0236/files/17381699377.pdf
    • https://cdn.shopify.com/s/files/1/0434/1003/0759/files/44032988269.pdf
    • https://cdn.shopify.com/s/files/1/0440/6345/7432/files/21104845415.pdf
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/15002803293.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/fimagipalabuzubeba.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6475/files/warozexizewemiromi.pdf
    • https://static.usrfiles.com/ugd/0dd040_37129da740f545b0a0c2d7b6a0d01f7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd358dfc61e540668b4d35995bce5230.pdf
    • https://static.usrfiles.com/ugd/5be868_717bd19ef17e49e9ae81a009ef1d183e.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f2fac69a3194e92864e903fbfe23559.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_off0000625d.bin
70b69c7611d344d6608d59a0c656d2d99dd98e8d3ddee7d2e56459d70f6c3b03
pdf-font-stream PDF embedded font (sfnt) at offset 0x625D 5764 bytes
font_01_sfnt_off00007620.bin
38107bcb4780d7225ac91afd578b6f17b35c68d6b635073463c17901eda13e02
pdf-font-stream PDF embedded font (sfnt) at offset 0x7620 14248 bytes