Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d3f8b983c10036…

MALICIOUS

PDF

92.7 KB Created: 2020-09-10 00:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d2fdac64203dd8ef8171792d8c284cf SHA-1: 3e66c815d0f8b748ac8130fae060ad3116c5e878 SHA-256: 97d3f8b983c10036dbe0f3518713054be9f353ad37ec11a425fbec548616d74e
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, another critical heuristic identified a mass external PDF link farm, with the primary malicious link pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wb?keyword=matrilineal%20definition%20pdf', confirming its presence.

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/wb?keyword=matrilineal%20definition%20pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/corrugated_steel_roofing_sheets_bristol.pdf
    • https://cdn.shopify.com/s/files/1/0436/3275/4841/files/76080575897.pdf
    • https://cdn.shopify.com/s/files/1/0432/1184/9890/files/gevavidepojiru.pdf
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/34295961569.pdf
    • https://cdn.shopify.com/s/files/1/0433/0972/7912/files/50719986849.pdf
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/objetivo_do_teste_ravlt.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/angle_of_elevation_and_depression_questions.pdf
    • https://cdn.shopify.com/s/files/1/0438/3529/3856/files/2214140771.pdf
    • https://cdn.shopify.com/s/files/1/0432/2269/6096/files/safugurado.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/interbridge_late_night.pdf
    • https://static.usrfiles.com/ugd/2ca09c_a94a8ec1d3394d86b0cf0ba8f0bc1447.pdf
    • https://static.usrfiles.com/ugd/b8c837_f7b99b6464864c338379f84ed86d63f1.pdf
    • https://static.usrfiles.com/ugd/3ce946_c9a1f0d9198449f2985eaf5feabc1107.pdf
    • https://static.usrfiles.com/ugd/b81754_631b5ae59361478abca9bc852b59d69b.pdf
    • https://cdn.shopify.com/s/files/1/0428/8095/8617/files/96251251169.pdf
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/catfish_farming.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001175f.bin
d52e34f2bce29d66e00367546aa826de5cd0bbbe9e53a22e8c82c468d67eb3a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1175F 4864 bytes
font_01_sfnt_off00012805.bin
e0d0f953cda31979ee1ba0e4eae8a79960bc6bcdec823063a264bc58b15ecc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12805 11284 bytes
font_02_sfnt_off00014e1c.bin
173f2339f84f3bc82931465d6f7fdca6152cf7ca7303596dab7d7f9fa061b57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E1C 16624 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.