Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a6305121a80be1…

MALICIOUS

PDF

42.0 KB Created: 2020-08-26 17:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af86170a1522926741d5abaa50c66087 SHA-1: a52a6c25284b86f7d291422a9651d9ede8759ba2 SHA-256: 85a6305121a80be1ddafc015529aadb2f948f07e0825d2e94e209e468e87b422
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains text suggesting a 'ledger template pdf' lure, and the primary malicious URL is a redirector. While no scripts were explicitly extracted, the presence of embedded links and the nature of the heuristics suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

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.com/pify?keyword=ledger+template+pdf
    • http://bevogaso.jamearichmondedwards.com/uploads/1/3/0/8/130874050/fitufibebe.pdf
    • http://vigazega.hajrasouliha.com/uploads/1/3/1/1/131164250/5112272.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/40923204691.pdf
    • https://cdn.shopify.com/s/files/1/0437/4708/2389/files/susuki.pdf
    • https://cdn.shopify.com/s/files/1/0430/9080/4893/files/74160842027.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/2018_ford_mustang_bullitt_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/7628354988.pdf
    • https://cdn.shopify.com/s/files/1/0428/5923/3443/files/43275481361.pdf
    • https://cdn.shopify.com/s/files/1/0463/3447/6449/files/batili.pdf
    • https://cdn.shopify.com/s/files/1/0437/5206/3125/files/brokeback_mountain_meme.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/tanaxofanomo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8770/7812/files/puditotoduxef.pdf
    • https://cdn.shopify.com/s/files/1/0431/6902/2109/files/dujomikoxowenad.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_off00006815.bin
4ae395b3eb5d47c885a67274e59181dd9911a6b4a6b1026aa39062dd37885f45
pdf-font-stream PDF embedded font (sfnt) at offset 0x6815 5124 bytes
font_01_sfnt_off0000796f.bin
5ac72f01766728e2d233ff46a8a427ab755faafdac8d2fad674a6a0f00939698
pdf-font-stream PDF embedded font (sfnt) at offset 0x796F 9996 bytes