Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a06b531b763e29…

MALICIOUS

PDF

46.1 KB Created: 2020-08-23 11:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c60659a3967e00f88c85165f819ea0b SHA-1: 20f4916ed00d22728c32dd82eda29595cf53e2c8 SHA-256: 33a06b531b763e291e7af0c1716991b7e9f8eefa32bbe095e9e028131843cbac
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, likely as part of a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains the string 'Guided reading level e passages' and a URL that matches the malicious redirector, indicating a lure to a phishing or malware distribution site.

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.cc/pify?keyword=guided+reading+level+e+passages
    • http://files.quirkyquiltress.com/uploads/1/3/0/7/130739971/rovuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/advances_in_meteorology_climatology_and_atmospheric_physics.pdf
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/jimanemilaxadowerevemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7319/files/agency_theory_corporate_governance.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4198/files/gepolukuzilubozivor.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/lubudifajoriza.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/visewedevemi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7524/7003/files/invert_colors_in_paint.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/86524830010.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/71251117435.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/wikelekonubivav.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_off0000545a.bin
24a521c97b768e2ae2d54c38988b1da6549ab9cfed2620ab6225035254153902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x545A 4908 bytes
font_01_sfnt_off0000650f.bin
34efb1e487f65140b7b516782597a8ab5819be483430d0053c401d7cd96b8d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x650F 10288 bytes
font_02_sfnt_off0000887c.bin
9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x887C 16092 bytes
font_03_sfnt_off00009d43.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D43 4324 bytes

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