Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc8a7b0a916b363…

MALICIOUS

PDF

40.2 KB Created: 2020-08-30 08:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8f472b94ab4541b1dedea04f6611003 SHA-1: a2c326b686bac2f95910b5018f12a5d4a8babbeb SHA-256: 1cc8a7b0a916b363eb35aeb19d057a84e3c82fca6b796915e69d4f511f2b6c25
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to containing a large number of external links, a technique often used for SEO manipulation or to host malicious content. One of the primary links points to 'ttraff.com', a known malicious redirector. While the document body contains garbled text, the presence of the malicious redirector URL and the link farm heuristic strongly suggest a malicious intent, likely to lure users to malicious sites or to engage in SEO spam.

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=skyrim+devious+devices+assets
    • https://cdn.shopify.com/s/files/1/0462/4731/3557/files/gumpaste_butterflies_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/1165/4307/files/80676004467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0465/0821/2374/files/xukuwanaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/6590/9160/files/jijifuduvafubo.pdf
    • https://static.usrfiles.com/ugd/b8c837_c4ba4d94663945188c53ab2d047448fd.pdf
    • https://cdn.shopify.com/s/files/1/0428/1879/7724/files/curso_balconista_de_farmacia_pronatec.pdf
    • https://cdn.shopify.com/s/files/1/0437/4082/3701/files/wurixuneku.pdf
    • https://static.usrfiles.com/ugd/b8c837_f20c8a843dca4c0fb47fb30996a38280.pdf
    • https://static.usrfiles.com/ugd/44b221_d7808c948dc9482e9f7de45d5ffbd209.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_off00005564.bin
a4b006c38e01bc930514b266d862e09bafd6d2929f81fbdfd5aedae1600d078c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5564 5380 bytes
font_01_sfnt_off0000679c.bin
112e5fd06d6330c88e8c5ee53a56dd53781348fe9d609bc141fe1408d9586553		 pdf-font-stream PDF embedded font (sfnt) at offset 0x679C 14400 bytes

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