Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f42617d53249e5a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-30 03:14:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 149b82e0e06273bc7fa6b7bda093e537 SHA-1: 62f98f91c382ba579184ba3d6e6b12ccdcefb6d9 SHA-256: 0f42617d53249e5a00c9c449b3299f43d0d5d2be38c63f3ad7cbdbfe6b4f78b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.ru/wix?keyword=the+indigo+spell+pdf'. It also exhibits a PDF link farm pattern, with numerous embedded URLs pointing to external PDF files. The ML classifier strongly indicates maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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=the+indigo+spell+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3efb351d85764819acd9f3a6ca600460.pdf
    • https://static.usrfiles.com/ugd/fd3290_c0f40fd7a9a34ef98a47137b480ec147.pdf
    • https://static.usrfiles.com/ugd/ec0c41_596ae31543424a3cb89277868bbff3ad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6805/4940/files/sekugukajizipamebifele.pdf
    • https://cdn.shopify.com/s/files/1/0436/1102/9667/files/rowdy_baby_video_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0438/3136/1686/files/zorijirupopamazazeki.pdf
    • https://cdn.shopify.com/s/files/1/0448/7839/7607/files/mejilugifibojubuforu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wiwatubaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/4174922937.pdf
    • https://cdn.shopify.com/s/files/1/0440/3573/5717/files/tabela_aliquota_icms_interestadual_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/dapogunodiwag.pdf
    • https://cdn.shopify.com/s/files/1/0440/7027/3174/files/zawiporo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/melanie_coleman_autopsy_report.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006319.bin
539c28062653442f2dbf93f63914820de42409a8ac3242be61ffbb46b6788d4c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 4944 bytes
font_01_sfnt_off000073ee.bin
5a6f131818fc17aed3d4224fe23c7864ecf75a8b2d6296b3e2c7a20372262e4d
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EE 10004 bytes