Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2aa3979435e30b…

MALICIOUS

PDF

40.0 KB Created: 2020-08-26 19:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 879082c47824821a0384c7de3ab524f9 SHA-1: 1678365ff797910025f113139173315c13494afc SHA-256: 6f2aa3979435e30b5b1e0883d6db8d776824b460a6d04159e64e1039e71bf885
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document also includes a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or redirection scheme.

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=for+dummies+template
    • http://jedopikir.veevabangadanceclass.com/uploads/1/3/1/4/131406717/risepaxajazameg.pdf
    • http://zijetatit.perfectcentral.net/uploads/1/3/2/6/132682090/dovatenunil-ketakafugonika-vuzetuwaxibines.pdf
    • http://files.4arrowsoutdoors.com/uploads/1/3/0/8/130814672/1910526.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/3255/8240/files/irony_in_the_story_of_an_hour.pdf
    • https://cdn.shopify.com/s/files/1/0463/1517/6096/files/vodusezetukaxalut.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2508/files/99493525308.pdf
    • https://cdn.shopify.com/s/files/1/0433/7470/6853/files/autodesk_inventor_tutorials_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/81711208735.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/asymptotic_notation_in_algorithm_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0462/5625/9221/files/street_fighter_4_apk_obb_data.pdf
    • https://cdn.shopify.com/s/files/1/0429/7677/2250/files/alphabetical_series_reasoning_questions.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_off00005fc0.bin
fa8d271d0cfc69b56ceec5d57ee642253185eab76e6de6c5c73d9387f2017252
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC0 5060 bytes
font_01_sfnt_off000070d8.bin
b5d14b6a5f58f4c1b25c4c739cad57dbc7abd1e1315b200b5c24425d4b735ef3
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D8 10220 bytes