Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a9b9efa1ea0a23…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 01:07:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: addfff7f9f2468b56b14da347d26392a SHA-1: 42d263e8b8023204b096213b29f43cf1a52e9687 SHA-256: 60a9b9efa1ea0a232e00ef25b4865fa97c6325620e2bb05ec73561767e538ad5
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.cc/pify?keyword=oxford+english+dictionary+pdf+free', is flagged as a malicious redirector. The document body also contains this URL and other Shopify links, suggesting a link farm or SEO manipulation tactic to distribute malicious content. The ML classifier strongly indicates maliciousness, and the overall structure points to a phishing or scam attempt.

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=oxford+english+dictionary+pdf+free
    • http://files.yoganess.net/uploads/1/3/1/8/131857914/wapezavazunon_tufurizod.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/8519/3621/files/nolajezupujas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8178/4734/files/asme_piping_standards.pdf
    • https://cdn.shopify.com/s/files/1/0439/9664/3486/files/tojodejuzanojigifak.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/xanadowebow.pdf
    • https://cdn.shopify.com/s/files/1/0431/7741/0724/files/html5_blank_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8712/files/reliliperepovajepotarafo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/77593290643.pdf
    • https://cdn.shopify.com/s/files/1/0457/8433/4502/files/28690972655.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6992/files/zobimotizeneponiwilib.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/xonokewifiz.pdf
    • https://cdn.shopify.com/s/files/1/0463/3713/0658/files/bfa_engineering_leveling_guide_8._2.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_off000060cf.bin
21febb87761a00472d289afb7107dc222e0520baf14c56cd1ae81b88b56b4f07
pdf-font-stream PDF embedded font (sfnt) at offset 0x60CF 5616 bytes
font_01_sfnt_off000073f4.bin
845e3bbf2f0531ddfb4c4431231375c08d9a274b72a63754ea121238b4258f59
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 10468 bytes