Malicious PDF — malware analysis report

Static analysis result for SHA-256 8258792b311663e0…

MALICIOUS

PDF

46.9 KB Created: 2020-08-10 23:41:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f2616b75444eef401930ada543d4c4be SHA-1: be5da85c6fded20e897cb34accbe9c6606fcea49 SHA-256: 8258792b311663e0ff0fa974c0776150f91540f5a9c9033a83d8035273a40fbd
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation. One prominent link redirects to a malicious URL, likely intended to trick users into downloading further malware. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=naruto+shippuden+manga+pdf+mega
    • http://files.stbartswednesbury.com/uploads/1/3/1/3/131379329/sutujefozasid.pdf
    • http://sodoxena.winchesterkycofc.org/uploads/1/3/1/0/131070450/fuvafukazarejovu.pdf
    • http://files.kellysargeant.com/uploads/1/3/1/4/131453574/2a462e86fd73.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6753/0657/files/rorudokabine.pdf
    • https://cdn.shopify.com/s/files/1/0435/1927/9259/files/90057092439.pdf
    • https://cdn.shopify.com/s/files/1/0432/3927/6707/files/wii_iso_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/verajuvudosoxozajarotupod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/46351173627.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/81479084349.pdf
    • https://cdn.shopify.com/s/files/1/0431/9238/5700/files/bobujemokep.pdf
    • https://cdn.shopify.com/s/files/1/0436/6050/9337/files/68009873432.pdf
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/ralufasiwuzuromawir.pdf
    • https://cdn.shopify.com/s/files/1/0432/1945/2072/files/huge_size_5e.pdf
    • https://cdn.shopify.com/s/files/1/0438/7205/9547/files/1699148995.pdf
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/zadomot.pdf
    • https://cdn.shopify.com/s/files/1/0429/0134/0319/files/71268835882.pdf
    • https://cdn.shopify.com/s/files/1/0437/1985/2187/files/dual_wield_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0436/1024/3230/files/64885581873.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_off0000709b.bin
81cb069d5465b5cd9826fd78af360b5e45e3859ae57879b68388e14fc5c21f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x709B 5392 bytes
font_01_sfnt_off000082cb.bin
7c53b86a6e781bb22af8ecd2530f222ef7d873e5669ef9068205dbeff81432c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82CB 13976 bytes

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