Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f64a738be849ff…

MALICIOUS

PDF

36.6 KB Created: 2020-08-30 21:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0f8fa3d224bcc2ab849fc35fd7eecf5 SHA-1: 2e6da0b5ac927e6ec7a30d9fe425444c26e2ab80 SHA-256: 56f64a738be849ff3f0afc61f39a76889987d4b3c26012608f9acca94c622e01
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=taboo+cards+esl', which is flagged as malicious. Additionally, a large number of links to other PDFs hosted on Shopify are present, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

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.me/wix?keyword=taboo+cards+esl
    • https://cdn.shopify.com/s/files/1/0431/8344/0036/files/94965584326.pdf
    • https://cdn.shopify.com/s/files/1/0431/9150/0961/files/pujenafalolebolap.pdf
    • https://cdn.shopify.com/s/files/1/0430/3778/6265/files/xobumufodos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2151/6449/files/19033035413.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/lunujumokuxujebipejaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4175/files/ios_language_codes.pdf
    • https://cdn.shopify.com/s/files/1/0440/8174/1976/files/83936585540.pdf
    • https://cdn.shopify.com/s/files/1/0428/3301/9047/files/69426682879.pdf
    • https://static.usrfiles.com/ugd/e2b09b_30ba66f760ca4d7a8de6159d99bdbbb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b72741332b4774bce30abf6f9c790c.pdf
    • https://static.usrfiles.com/ugd/e3834b_f07bbe2544b342e497a2347328c1c67a.pdf
    • https://static.usrfiles.com/ugd/33a2e4_0270da8f5522415191068c752fb23e57.pdf
    • https://static.usrfiles.com/ugd/4b7290_b3bebb1900f54eb69fd831a25c8ae754.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_off0000532c.bin
ab7687beffabe9dd277bdbe937192de480cca16a189ad44259ef9827d42f6a77
pdf-font-stream PDF embedded font (sfnt) at offset 0x532C 5020 bytes
font_01_sfnt_off0000643e.bin
e5f032a55b1d41d86368ae6345d54d3252a29de76b0d829c5291aa52ec197fd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x643E 9892 bytes