Malicious PDF — malware analysis report

Static analysis result for SHA-256 8da211608dce7392…

MALICIOUS

PDF

51.7 KB Created: 2020-08-14 17:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eddc5051bcb3cfe272a2621190eb04f5 SHA-1: 614f284e856f8dd47c6220d3e6ac079d7faa8953 SHA-256: 8da211608dce73921060b28c48a8140061b6de40cfaf10f8a7b22aa613e7e299
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, which points to 'ttraff.ru'. This URL is used in conjunction with a search query for 'alcatel 3026 manual español', suggesting a lure to trick users into clicking. The PDF also exhibits characteristics of a link farm, embedding numerous links to other PDFs, many hosted on Shopify. The ML classifier strongly supports the malicious nature of this PDF.

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=alcatel+3026+manual+espa%25C3%25B1ol
    • http://files.knoxwm.com/uploads/1/3/2/6/132681303/tovulinusenomikuxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/aquaponics_system_plans.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11286786524.pdf
    • https://cdn.shopify.com/s/files/1/0428/1909/2647/files/jepokirabazabojuroxek.pdf
    • https://cdn.shopify.com/s/files/1/0434/6803/0102/files/88418157593.pdf
    • https://cdn.shopify.com/s/files/1/0448/3943/6449/files/female_foeticide_essay.pdf
    • https://cdn.shopify.com/s/files/1/0447/9365/9543/files/skripsi_tentang_akuntansi_manajemen.pdf
    • https://cdn.shopify.com/s/files/1/0432/5005/7373/files/63458291493.pdf
    • https://cdn.shopify.com/s/files/1/0435/7727/8623/files/bexememiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/26223042432.pdf
    • https://cdn.shopify.com/s/files/1/0437/0015/8629/files/zatomusokamosijegetimopo.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_off00007d75.bin
694d05effeadf3e556b88726064d212ed33545a4b4e3c33d205d8a4475d7a557
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D75 5608 bytes
font_01_sfnt_off00009018.bin
760a0bdb11a89efd390d33cc03a882191cb451ebcba82a01259f0bb2e774ada2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9018 10032 bytes
font_02_sfnt_off0000b263.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xB263 4324 bytes