Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e08e5f9c349655a…

MALICIOUS

PDF

34.3 KB Created: 2020-08-12 09:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af8a6e1f04abdb1a38d7ad8f201cb924 SHA-1: 0f76f5d44edbc4a9c8cd3e199bdc3c734645cbcf SHA-256: 3e08e5f9c349655a5c6ac82a992a7abdcfdde27880a57da567fff320da015112
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=administracion+de+la+cadena+de+suministro+chopra+pdf+gratis, which is likely used to redirect users to malicious content. The document body contains garbled text but also includes several URLs, some of which are benign Shopify links, but others point to unknown domains that are likely part of the link farm.

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.ru/pify?keyword=administracion+de+la+cadena+de+suministro+chopra+pdf+gratis
    • http://venudotaf.phoenixlashlounge.ca/uploads/1/3/1/4/131454024/f92871683c79f6.pdf
    • http://tujusi.douglaspharmachems.com/uploads/1/3/2/6/132681352/5188991.pdf
    • http://sejog.lloydticklab.ca/uploads/1/3/1/4/131483371/9029308.pdf
    • http://files.tatrafarm.com/uploads/1/3/2/7/132712530/nolijatetij-wigaxabidusof-ranoretuwovi-gimofidefuzuvaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5348/2138/files/constitution_brazil_english.pdf
    • https://cdn.shopify.com/s/files/1/0440/8963/9077/files/kufedasodusufasaj.pdf
    • https://cdn.shopify.com/s/files/1/0448/1276/3298/files/mapa_metro_oporto.pdf
    • https://cdn.shopify.com/s/files/1/0441/0979/1384/files/cours_capteur_d_humidit.pdf
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/66978611474.pdf
    • https://cdn.shopify.com/s/files/1/0433/4800/0922/files/towolojogumomorefodim.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/davozefuxujalovoxokerefo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/anti_cancer_diet_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/dowokinonutitedegop.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/xazikuzovarufumufewos.pdf
    • https://cdn.shopify.com/s/files/1/0434/6488/4384/files/large_lava_lamp.pdf
    • https://cdn.shopify.com/s/files/1/0432/5015/5688/files/sibijujewidamed.pdf
    • https://cdn.shopify.com/s/files/1/0438/1147/1520/files/73916024414.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_off000046ec.bin
81301c60108ca30fa37303693a3fdf863f695b3999e72387af784bd22af64557
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EC 5556 bytes
font_01_sfnt_off0000599a.bin
687eafd2077b8011f4e2b6a20be1ac8e55e72d0efb7b457a23ff4e1f56a4059e
pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 10280 bytes