Malicious PDF — malware analysis report

Static analysis result for SHA-256 f00d92d53e34b187…

MALICIOUS

PDF

39.5 KB Created: 2020-08-24 02:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 209946afad092d8b0b85b8ccfe8f9788 SHA-1: 98a3dc3946dd9c3484551f3ed3ba8a4ca89cea53 SHA-256: f00d92d53e34b187a889db2307bded6c04daee5981056be1d22cf059b1a6e607
154 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 of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains the string 'Australia tv guide qld' and the malicious URL, suggesting a lure to disguise the malicious intent. 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=australia+tv+guide+qld
    • http://vogepejel.seer-gallery.com/uploads/1/3/1/3/131398140/zemigajevipokukemi.pdf
    • http://files.placeworksdesign.com/uploads/1/3/2/3/132303270/tituxepepilaru.pdf
    • http://punibiz.revival42.org/uploads/1/3/0/7/130776661/mazomabimetebuvum.pdf
    • http://files.peakskiacademyparkcity.com/uploads/1/3/2/6/132683000/jilepukagako.pdf
    • https://cdn.shopify.com/s/files/1/0432/6237/8152/files/zosuserebidexofi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5833/9733/files/alphabet_lettering_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/7614/8638/files/muzugobuwufeda.pdf
    • https://cdn.shopify.com/s/files/1/0432/4350/3783/files/diccionario_biblico_certeza_descargar_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0429/5720/9753/files/rorutanuxibule.pdf
    • https://cdn.shopify.com/s/files/1/0437/2329/2822/files/97375993954.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/74223918954.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2342/files/68002247150.pdf
    • https://cdn.shopify.com/s/files/1/0430/0754/1401/files/schubert_wanderer_fantasy_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/basic_java_tutorial_for_beginners_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0497/files/gapanisuweropubasiparogev.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c3c.bin
de74834f7e978ba581f22f5c61e5147de69c1f2b7cb5240bf65b50578501bfd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3C 5168 bytes
font_01_sfnt_off00006dd0.bin
95da42630f3021bb4ad8f71fc0969583d9220187d505348a07638a10c466aab7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD0 10360 bytes