Malicious PDF — malware analysis report

Static analysis result for SHA-256 804b8798c8b2c6c9…

MALICIOUS

PDF

47.0 KB Created: 2020-08-19 05:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6e23785626d1c1ab6cac58fb616f7f5 SHA-1: e6d4fd39160b8131e139a1988c392c6195c4ee3f SHA-256: 804b8798c8b2c6c97108e8f9d22b1a8dc10cda8858e46460614540fa75df31ae
154 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious destination. The ML classifier strongly indicated maliciousness. The document body contains text related to 'guide installation suntuf' and the authoring application, suggesting a lure or context for the embedded links.

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=guide+installation+suntuf
    • http://fuzap.ilanschraer.com/uploads/1/3/1/4/131483068/3389815.pdf
    • https://cdn.shopify.com/s/files/1/0431/7102/0957/files/suvuxax.pdf
    • https://cdn.shopify.com/s/files/1/0434/1376/6293/files/kopedoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/colours_tv_channel_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0437/6117/2631/files/nopeselavafogakozimusog.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/husqvarna_55_chainsaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/vawevipaluw.pdf
    • https://cdn.shopify.com/s/files/1/0429/3872/8604/files/hwy_10_traffic_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7978/files/43110240346.pdf
    • https://cdn.shopify.com/s/files/1/0440/0054/2878/files/karezolirubakovawubawused.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/raised_eyebrow_ascii.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/25412222615.pdf
    • https://cdn.shopify.com/s/files/1/0428/7463/4403/files/wawojiwudelabeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/79992273954.pdf
    • https://cdn.shopify.com/s/files/1/0439/6482/5758/files/93548252684.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_off000076e7.bin
33045efe3286f25294c0470337ba724aa33f65185c4832feaadb0f37510945aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x76E7 4836 bytes
font_01_sfnt_off00008766.bin
61ed4a20ea6fc7e89422ac74812c24ddeaefd74244f6579668febcc6942518db
pdf-font-stream PDF embedded font (sfnt) at offset 0x8766 11748 bytes