Malicious PDF — malware analysis report

Static analysis result for SHA-256 2711a10b22ec7563…

MALICIOUS

PDF

37.5 KB Created: 2020-08-11 15:03:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f901da595c33adfed4adbd3a6c5c9b8c SHA-1: 9e4d67721f71d92a2ec98c366ed385d3bd145c3d SHA-256: 2711a10b22ec7563e1e59b5a9b1fed5999e04812738b31d22761e27bbf59a7fd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The presence of the malicious redirector suggests the document's primary purpose is to lead the user to a compromised or malicious site, likely for phishing or to download further payloads.

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/pify?keyword=altistart+22+manual+pdf
    • http://files.jsboutique-llc.com/uploads/1/3/1/8/131857818/9e58638.pdf
    • http://files.portlandbonsaisupply.com/uploads/1/3/1/8/131871685/ratixuvawe-gudusiwiw-xizibo.pdf
    • http://files.miacastagna.com/uploads/1/3/1/4/131406892/f6901b048.pdf
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/10652652307.pdf
    • https://cdn.shopify.com/s/files/1/0430/8015/5290/files/riger.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/81101153462.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/artemis_fowl_the_eternity_code_graphic_novel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/vosorulukasujusekamep.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/murexexirigakeve.pdf
    • https://cdn.shopify.com/s/files/1/0437/8145/6023/files/scott_kelby_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/business_development_manager_job_description.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/37339889872.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/tabuvexesixol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6630/2376/files/sejoz.pdf
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/bcece_le_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/jigedufajuj.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_off000045a1.bin
4f4492105994291f3310d4b7d74a1eee52afc88ee9991f808661fc3eb0e43fcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45A1 4964 bytes
font_01_sfnt_off0000564b.bin
7eb485f09ddcde17411dc4df446439bfadb41be84c63721e5f139e6a0db60c73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x564B 12192 bytes
font_02_sfnt_off00007acb.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 4324 bytes

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