Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a1004d2e7f7d5a…

MALICIOUS

PDF

34.1 KB Created: 2020-08-10 05:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f09188edfc47ca0558d852cda31f9f50 SHA-1: daed4112394f6e491f83873e88331fabfbb094be SHA-256: 64a1004d2e7f7d5adf51f67609d8e0402d2f5a08b8d340478279a59b55e1ea61
194 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, masquerading as a "multivariate data analysis for dummies pdf" to entice users. One of the primary links, https://ttraff.ru/pify?keyword=multivariate+data+analysis+for+dummies+pdf, is identified as a malicious redirector. The presence of multiple links suggests a link farm or SEO poisoning tactic to distribute malicious content. The document's structure and embedded links indicate an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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=multivariate+data+analysis+for+dummies+pdf
    • http://files.aoemedia.tv/uploads/1/3/1/4/131483254/f5e1c3a.pdf
    • http://files.eofsaa.org/uploads/1/3/0/8/130813317/2602765.pdf
    • http://files.fcoca.org.uk/uploads/1/3/1/6/131606000/2210662.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0195/3952/files/95597664403.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9751/files/police_communications_technician_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2481/files/wojurinuri.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/zabojosigero.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/waxuzegafikefenoxiwebedag.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4986/files/service_tag_cmd.pdf
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/files/71848447109.pdf
    • https://cdn.shopify.com/s/files/1/0432/3554/1151/files/66052891889.pdf
    • https://cdn.shopify.com/s/files/1/0433/0940/0214/files/nevuzab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/kejajan.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/ritelebijaluximesus.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/
    • https://cdn.shopify.com/s/files/1/0432/5326/8642/fil
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000486e.bin
be44caf92d3e9379d9521a17371f251eac143d8ea7227ea789578a60bd62014c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x486E 5356 bytes
font_01_sfnt_off00005aa6.bin
a6808db0cac790cd52a7a1df7a9e3410336f6af3055101e01b00bb763942d9ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA6 9648 bytes

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