Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2b0d96c822c292…

MALICIOUS

PDF

35.1 KB Created: 2020-08-29 02:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e052fa1c59cc8f92094526b9a165bbb5 SHA-1: d62a7535791f465c8099a7b0172f9d4e0e877cad SHA-256: cd2b0d96c822c292cd13f88452f6a8dab62e94f518c523b7c16409b089cd05ae
154 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 link farm. The primary malicious URL identified is ttraff.ru, which is known to host malicious content. The document body also contains numerous links to Shopify, likely part of the link farm strategy. The ML classifier strongly supports the malicious verdict.

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/wix?keyword=Funny+toohey+cerveza+comercial
    • https://cdn.shopify.com/s/files/1/0429/3623/8236/files/cromartie_kilns_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/2855/9510/files/whatsapp_beta_for_windows_phone_8._1.pdf
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/52545744645.pdf
    • https://cdn.shopify.com/s/files/1/0434/5099/0753/files/18138613458.pdf
    • https://cdn.shopify.com/s/files/1/0433/8978/0124/files/cardiomiopatia_dilatada_em_caes.pdf
    • https://cdn.shopify.com/s/files/1/0463/3034/7675/files/18646601981.pdf
    • https://cdn.shopify.com/s/files/1/0434/7104/4770/files/feropaxevip.pdf
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/72916895706.pdf
    • https://cdn.shopify.com/s/files/1/0437/8837/0077/files/33920170704.pdf
    • https://static.usrfiles.com/ugd/b8c837_9d11b6247966490d9a33fece389ace91.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a03222cadb146c1a43d296296f3e47a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a888254db0e487a9d5dedefc3f79604.pdf
    • https://static.usrfiles.com/ugd/b8c837_758a16ec0518498996994908b41602d4.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_off00004d3f.bin
7c8029adc31dc5d511fb87b3bdc8b05e2a26fffdb07e77e1f6447f796097fc4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3F 5028 bytes
font_01_sfnt_off00005e3d.bin
17d71dd4bcad42cae8dbec760b03c4af992283ec3a536dde9b5e5714c38d5c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3D 9756 bytes