Malicious PDF — malware analysis report

Static analysis result for SHA-256 d698756ca1592d1d…

MALICIOUS

PDF

57.3 KB Created: 2020-08-13 23:07:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bda5fd6b5dee8b4340fb02e53dae13a3 SHA-1: 5c48d07516dc7b1e9e5921c52964dc3070924e04 SHA-256: d698756ca1592d1d973e6bdde5ac05aa05c34eafecc64dfa81d6697a58ee2e2b
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URL 'https://ttraff.cc/pify?keyword=extracellular+matrix+pdf' is a known malicious redirector. The document body contains garbled text but includes the same redirector URL, suggesting it's part of the lure. The numerous links, many pointing to Shopify domains but some to other unknown hosts, are likely intended to distribute further malicious content or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=extracellular+matrix+pdf
    • http://files.thedollhousellc.com/uploads/1/3/0/7/130738960/07bf13154abd7.pdf
    • http://files.amasesd.com/uploads/1/3/1/4/131437474/7021662.pdf
    • http://files.mariannematthews.com/uploads/1/3/1/8/131856195/721612.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/2931637872.pdf
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/lucent_synonyms_and_antonyms_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/punula.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/3919996320.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/towivotomepux.pdf
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/lupapu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/dobotudaletuxudak.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5772/files/bujorapuvopulaximu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5266/1912/files/calculus_early_transcendental_functions_7th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/vienna_convention_on_the_law_of_treaties_1969.pdf
    • https://cdn.shopify.com/s/files/1/0437/2883/0632/files/naropikokakumunupusomaxax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/gapaxirijimesivozar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/zejuzowolaraxazedo.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_off0000a33a.bin
ec9c37ca2fba0885e3945c7aaff7e96dd5d12fbdb5d97d743657cc2c9397bd6d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA33A 5148 bytes
font_01_sfnt_off0000b4aa.bin
fae42c60667f4f98c2efc92914446724d397f48b9613b1e393c6a11bd8b73003
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AA 10452 bytes