Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d749ecbc0d31f1d…

MALICIOUS

PDF

57.3 KB Created: 2020-08-25 19:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 601db259795f2bd0eb02df6a78539dc3 SHA-1: 550b4aae363242f85a88e74aeaa36b49dfa6c66c SHA-256: 7d749ecbc0d31f1def262eb2ca1b5f813e59e3e58c557ad7619b93cf7cb4f2a5
162 Risk Score

Malware Insights

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

The PDF contains embedded links that are part of a link farm, with one prominent link leading to a known malicious redirector. The document body text, though partially corrupted, suggests a lure related to financial statements, aligning with the 'SE_INVOICE_LURE' heuristic. The primary malicious URL identified is ttraff.com, which is used to redirect users to other potentially malicious sites.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.com/pify?keyword=financial+statements+template+xls
    • http://lefawel.fadedaf.shop/uploads/1/3/1/4/131406436/8789696.pdf
    • http://xivovum.triplecrownlacrosse.com/uploads/1/3/1/4/131453558/detax.pdf
    • http://files.nyuomssociety.com/uploads/1/3/1/4/131453485/lafedozofugov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4352/8609/files/dowesakixe.pdf
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/recovery_server_could_not_be_contacted.pdf
    • https://cdn.shopify.com/s/files/1/0432/9468/7400/files/75757840170.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/the_avengers_logo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/55359651298.pdf
    • https://cdn.shopify.com/s/files/1/0448/1577/7954/files/telugu_calendar_2020_may.pdf
    • https://cdn.shopify.com/s/files/1/0431/4074/3329/files/english_phonetic_spelling_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/5740914984.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_off0000a50e.bin
b1ab7e63e2ecdaa4588105c65eb0a798477077c15cfcac631076ebac777b2ed2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA50E 5004 bytes
font_01_sfnt_off0000b603.bin
adac82dff1f9be7e9daf11d7e1b1b39718fdbbeb79491e60a695db9f169e9079
pdf-font-stream PDF embedded font (sfnt) at offset 0xB603 10172 bytes