Malicious PDF — malware analysis report

Static analysis result for SHA-256 b692e28822358c41…

MALICIOUS

PDF

49.7 KB Created: 2020-08-01 06:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2e81a54a922fd8c71eeea237779f37a4 SHA-1: 382cf978870c33a4f6b926681464df05911a39c3 SHA-256: b692e28822358c411196dd2217ab3b9781515000537e791cfcbc03416845ce81
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and one critical link to a redirector at 'ttraff.ru'. The document body text, though heavily obfuscated, contains the string 'Roku channel codes database', suggesting a lure to entice users to click the links. The primary malicious link is 'https://ttraff.ru/pify?keyword=roku+channel+codes+database', which is identified as a known malicious redirector. The presence of a link farm and a malicious redirector indicates a phishing or social engineering attack.

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.ru/pify?keyword=roku+channel+codes+database
    • http://files.tamrisfarmnubians.com/uploads/1/3/0/8/130813095/25222deedba28d.pdf
    • http://files.cantonliterarymanagement.com/uploads/1/3/0/7/130776536/2117967.pdf
    • http://files.constanceisrael.com/uploads/1/3/0/7/130776542/wuwom.pdf
    • http://files.manolyartdesign.com/uploads/1/3/1/4/131455543/4e5294b3e1e6245.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdf
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/kekupofagepasanafuzafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/67568287352.pdf
    • https://cdn.shopify.com/s/files/1/0439/0102/6459/files/79474849203.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/futinipokixazozot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0511/6575/files/vololola.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/tabamodamalutosenini.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7971/files/ligejovixeri.pdf
    • https://cdn.shopify.com/s/files/1/0432/6372/1637/files/79298702806.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_off00007701.bin
fb94c68b5ef8f43470d2eab7c0210ae176d6d87f31678db7e5e04a55cb7b1e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7701 4976 bytes
font_01_sfnt_off000087e5.bin
0f9989e9ecb28baab6aa4ca952ed3fbc26ac44218ad75c3559010734d0521f32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 10364 bytes
font_02_sfnt_off0000ab5d.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB5D 4324 bytes

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