Malicious PDF — malware analysis report

Static analysis result for SHA-256 f662ccbe630e9add…

MALICIOUS

PDF

36.8 KB Created: 2020-08-23 12:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33a015d0c4b15650218023ba9f0ced7c SHA-1: ffa731395f735bc312c8482b73c0a92301dccd5e SHA-256: f662ccbe630e9add1fe2351518a62c9482768b9809ffe32cbcb669664462a05b
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, many of which point to Shopify domains but ultimately redirect to the malicious domain 'ttraff.com'. This indicates a link farm or redirection scheme designed to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is used for malicious redirection.

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/pify?keyword=feature+article+template+word
    • http://putewobo.gfreegenius.com/uploads/1/3/0/8/130814328/wafiwapoxoj-zumukexu-voribojuge.pdf
    • http://files.writinganswers.net/uploads/1/3/0/9/130969472/jadomomaranujesu.pdf
    • http://files.carlycsinn.com/uploads/1/3/1/4/131407164/4275115.pdf
    • http://files.primitiveart.online/uploads/1/3/1/4/131483255/fadov_zuxiduwepugu_pakopetuza.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/62057596115.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/54622886391.pdf
    • https://cdn.shopify.com/s/files/1/0446/3912/5667/files/2020_analyzing_data_with_power_bi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1762/3957/files/sexesupujitusiridepiwesew.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/ruvaxozisasazodub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2690/6264/files/lalosuxigorozatafinixap.pdf
    • https://cdn.shopify.com/s/files/1/0428/4393/0791/files/aha_dietary_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/bernardo_de_monteagudo.pdf
    • https://cdn.shopify.com/s/files/1/0450/0887/9766/files/panikajevosamezedogo.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_off00005361.bin
a85f63dca0bcd0372e0eec61430b48ed89515dca99f76aaa9edde14f2d0f991a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5361 5088 bytes
font_01_sfnt_off000064a9.bin
d2ad9149a28071f209ee37aa80314c597a15294087ece1a1c631292a5d1be072
pdf-font-stream PDF embedded font (sfnt) at offset 0x64A9 9844 bytes