Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d1d6a38aa56bc3a…

MALICIOUS

PDF

52.8 KB Created: 2020-08-24 11:22:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d77b13e0804b02b2f51adfa166262187 SHA-1: 2d2ef77ef449b0b5f03c4e57d4e3960d1eac9987 SHA-256: 7d1d6a38aa56bc3afe3ef969ba1943565dd175c966098bfa391ff2035ea87e49
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains the same redirector URL and a large number of links to PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. 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=electrons+in+atoms+chapter+5+study+guide
    • http://gofowi.ndcsw.org/uploads/1/3/0/7/130776873/7778961.pdf
    • http://files.rightdevelopmentfoundation.com/uploads/1/3/1/3/131379553/990693.pdf
    • http://navew.taiwanhotelnews.com/uploads/1/3/0/8/130813714/pumenixuwifo.pdf
    • http://files.recycledcabinetsolutions.com/uploads/1/3/0/7/130776077/luguzulelotof-jezoxedozikag.pdf
    • http://files.hinghamwomensclub.org/uploads/1/3/1/4/131454521/kewadinod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9443/4207/files/34569388188.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5570/files/17460412312.pdf
    • https://cdn.shopify.com/s/files/1/0429/6438/5951/files/60037525944.pdf
    • https://cdn.shopify.com/s/files/1/0434/4594/4481/files/bim_360_docs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6750/6849/files/kumulavevul.pdf
    • https://cdn.shopify.com/s/files/1/0430/3159/3113/files/graduate_school_tu_delft_course_attendance_form.pdf
    • https://cdn.shopify.com/s/files/1/0429/9181/2767/files/11570153034.pdf
    • https://cdn.shopify.com/s/files/1/0439/0086/2619/files/2206994813.pdf
    • https://cdn.shopify.com/s/files/1/0436/9101/6347/files/solving_linear_equation_worksheet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000792a.bin
1da0b9999ef76ba268392b20ebc0eee7c2d0ba655bcc37d0311ab5d74e186c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x792A 1596 bytes
font_01_sfnt_off00008128.bin
c4a36549c35ed968974aa328d911e3db1b03bf9d120f0399995a0b999f3e9505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8128 5552 bytes
font_02_sfnt_off000093d8.bin
b686c81166f1b7a4054d20212cb4791380f3db07b0c7e41aa30e6d8b69070845		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93D8 10440 bytes
font_03_sfnt_off0000b740.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB740 4324 bytes

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