Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ebe1fcabf3a8c2…

MALICIOUS

PDF

41.8 KB Created: 2020-09-03 11:46:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 118cdc37dd1e45b4cf5668ded79db418 SHA-1: f503b9e14b5f7fcd39bfdabf9c8f2a678be7a6ca SHA-256: 08ebe1fcabf3a8c2d34d616b858633c52da4b5b1813b4791bff2b10a2a30bd15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links and text that mimic a downloadable Excel file, aiming to trick users into clicking a URL. The primary URL, https://ttraff.ru/wix?keyword=challan+no+itns+280+in+excel+format, is flagged as a malicious redirector. The ML classifier strongly indicates malicious intent, and the presence of numerous links suggests a link farm or SEO poisoning tactic.

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=challan+no+itns+280+in+excel+format
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/7620/6240/files/wipepavosivavateguzol.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/shri_durga_saptashati_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/7361/8599/files/paladin_mount_quest.pdf
    • https://cdn.shopify.com/s/files/1/0430/6809/6661/files/43780067613.pdf
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/entropic_ward_5e.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9323/files/xixofozojavuvogasevoretak.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdf
    • https://cdn.shopify.com/s/files/1/0437/4944/1687/files/zoxeliwavovisuzanonin.pdf
    • https://static.usrfiles.com/ugd/89363e_afab7a1ae21a489aae1e114ac19a5a3f.pdf
    • https://static.usrfiles.com/ugd/b8c837_047b736365034e24a6aa527cd62a058b.pdf
    • https://static.usrfiles.com/ugd/d017d5_78e39e82860b45689152234ac113616b.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3c91d1cdd20489fab72408da3a639f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_5784fc09946c43cf9efc5ff985258230.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005923.bin
39c4828c67e27cfb17c1f5eb961be7b36a8c1bc6d3a2ad01daf0f6bbca7118d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5923 5468 bytes
font_01_sfnt_off00006b83.bin
2fc5367000697ca768ca2bf1b2be9095759dd14603e2b36b4a341cabf091aca2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B83 9584 bytes
font_02_sfnt_off00008c3d.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3D 4324 bytes