Malicious PDF — malware analysis report

Static analysis result for SHA-256 203bb92f513c61c0…

MALICIOUS

PDF

31.7 KB Created: 2020-08-15 01:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d43eb7988cd727e6e3ec85a580b25358 SHA-1: 7e4b35db3ce4f5d3add28f42294811a5e164dd70 SHA-256: 203bb92f513c61c00cfd1112480f0b73cc63c75ff7d0bda14a5366df6313fbd2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary redirector identified as ttraff.ru. This infrastructure is known for hosting malicious content and is part of a link farm strategy. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests an attempt to lure users to potentially harmful websites.

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.ru/pify?keyword=guntur+hourly+weather+report
    • http://files.sweetgenesis.com/uploads/1/3/0/7/130775635/d120827fc5.pdf
    • http://files.albertlilly.com/uploads/1/3/0/9/130969461/diveme-xikebimakezip-werimin.pdf
    • http://files.cakessweetstreats.com/uploads/1/3/1/8/131856904/sorodamafidive.pdf
    • http://files.highergroundbackpacking.com/uploads/1/3/0/7/130738620/b23fe0a7fc62.pdf
    • http://files.420inthekitchen.com/uploads/1/3/1/3/131380916/a48c8262d4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.pdf
    • https://cdn.shopify.com/s/files/1/0428/5769/3347/files/carestream_drx_revolution_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/16966790481.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6614/files/zewulanoruwomuzebuwuxel.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8853/files/riff_raff_instagram.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8357/files/five_senses_worksheets_for_toddlers.pdf
    • https://cdn.shopify.com/s/files/1/0428/1060/5735/files/arabic_numbers_tracing_worksheets.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_off000041e9.bin
e1c1cea3ffc3050839533d68a5683d57657d91f7184c679d9f34e0cf43e5a89d
pdf-font-stream PDF embedded font (sfnt) at offset 0x41E9 4952 bytes
font_01_sfnt_off000052d1.bin
4e09882fb9e9e13fe38d22718a6b50e68bb40fb0e116420d1e79a36a2c398527
pdf-font-stream PDF embedded font (sfnt) at offset 0x52D1 9216 bytes