Malicious PDF — malware analysis report

Static analysis result for SHA-256 6653b08a4395c354…

MALICIOUS

PDF

42.0 KB Created: 2020-08-10 00:23:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da39bbc81103e5d561029941cb2fc4f0 SHA-1: b9f2dfea7e48ca00c2c98a9cf951c1d6914251d0 SHA-256: 6653b08a4395c35493a551cb62e4237816758d31100e89361517e543423bade8
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to a 'Bali pathfinder map PDF'. The presence of many external PDF links, some of which are hosted on benign platforms but likely part of a link farm, indicates an attempt to manipulate search engine results or distribute malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or redirection attack.

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=bali+pathfinder+map+pdf
    • http://kuvuwis.aandgcleaningdc.com/uploads/1/3/1/4/131483154/bapefatoweli.pdf
    • http://files.salon2000.co.uk/uploads/1/3/1/6/131637104/b6868.pdf
    • http://kegukuf.lege-artis.ca/uploads/1/3/1/4/131437919/534f3bdf4ddf.pdf
    • http://gipar.frankfordchargers.org/uploads/1/3/1/1/131164250/9766637.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0635/3823/files/angulos_entre_dos_paralelas_y_una_transversal.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/bakeji.pdf
    • https://cdn.shopify.com/s/files/1/0428/1715/9335/files/77257637598.pdf
    • https://cdn.shopify.com/s/files/1/0433/6893/9672/files/mexenizaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/17114813060.pdf
    • https://cdn.shopify.com/s/files/1/0431/3779/4204/files/acs_general_chemistry_exam.pdf
    • https://cdn.shopify.com/s/files/1/0434/5161/3334/files/gadagipivasexe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/kinekagewa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6573/files/pojagerolunekodipa.pdf
    • https://cdn.shopify.com/s/files/1/0431/9834/9471/files/39217889551.pdf
    • https://cdn.shopify.com/s/files/1/0440/4707/3445/files/kivegazotisaserepodeni.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_off000065c1.bin
c528d0b131fbef17bc5aa6ada5477bc205055f9eafe441ff53d92ac339aa1aa3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C1 5152 bytes
font_01_sfnt_off00007723.bin
420fef8304a72879e1b6b6cc536356f3670dc3b2db5b55f27c232ba3046dfba1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7723 10436 bytes

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