Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae4f02752481287…

MALICIOUS

PDF

45.4 KB Created: 2020-08-09 04:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 234f8a4729ab297a9c6cb7628d982c7d SHA-1: 330f838e61c52026cf87a0889c3a120fb64903cc SHA-256: dae4f02752481287bfe53070b748f44d55ca22e39f8be7363ba67ae02c8ee8a7
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a PDF SEO link farm. The document body, though heavily obfuscated, contains text referencing 'Astrology for dummies pdf download' and includes the malicious URL, suggesting a lure to download further content. 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.com/pify?keyword=astrology+for+dummies+pdf+download
    • http://vidalebe.lemonlushonline.com/uploads/1/3/1/4/131406717/9702107.pdf
    • http://vobisopo.stallionrep.com/uploads/1/3/0/7/130775982/8917e44ec60.pdf
    • http://files.12monthbeauty.com/uploads/1/3/0/8/130874128/6301925.pdf
    • https://cdn.shopify.com/s/files/1/0429/6956/3290/files/lezelafuxebadipamumeba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4469/9288/files/96894262671.pdf
    • https://cdn.shopify.com/s/files/1/0432/2898/7547/files/ratoxivuwivir.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/rename_multiple_files.pdf
    • https://cdn.shopify.com/s/files/1/0430/3002/0247/files/fireruvugaza.pdf
    • https://cdn.shopify.com/s/files/1/0434/2880/6808/files/49503243010.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2071/files/82382933698.pdf
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/rapid_review_pathology_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4293/8784/files/lenewegitasazoninovesudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6542/5570/files/2195523337.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/lasosavidofonoxikagubo.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_off00007331.bin
0732972b797123ac0cb3f324af9a9e4489a73ad8d87d80a7e5db2b7a30056018
pdf-font-stream PDF embedded font (sfnt) at offset 0x7331 5544 bytes
font_01_sfnt_off00008615.bin
557959ca734c21fecee293823d7a939a201f3bd253eca4a58160e1a39df9ccdb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 10120 bytes