Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1be9488a23317f…

MALICIOUS

PDF

49.8 KB Created: 2020-07-28 03:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fe090a0b0d9134449d783d980d865a7f SHA-1: 22aa4a176a03f01053b0daafec2e9199c81dcf0b SHA-256: 6f1be9488a23317f79f09967f331756662e4b5acda40b6ef4631830df3831bd6
154 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though obfuscated, suggests a lure related to templates. The presence of numerous PDF links, many benign but some leading to the malicious redirector, indicates a link farm strategy to distribute malicious content.

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=letterhead+template+word+format
    • http://files.emmadcohen.com/uploads/1/3/1/0/131070525/36493ddcec45.pdf
    • http://files.jagartsupply.com/uploads/1/3/1/4/131453990/17c8b2832.pdf
    • http://files.kimballstjosephs.com/uploads/1/3/1/4/131453494/bitoligogavadesunir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/0696/6429/files/51128280538.pdf
    • https://cdn.shopify.com/s/files/1/0434/3503/2737/files/fazade.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/poxavugebazitobazige.pdf
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/20439124806.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/zokopufipadod.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/xetomozorowibufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/79265304831.pdf
    • https://cdn.shopify.com/s/files/1/0439/9998/5822/files/43020025822.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xatet.pdf
    • https://cdn.shopify.com/s/files/1/0433/2349/0457/files/11993778599.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/zabop.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_off000087a1.bin
480cb4bca1e46b24c06b7014165b6349ae7656db9a7e6e3a4a03918b49c1848c
pdf-font-stream PDF embedded font (sfnt) at offset 0x87A1 4768 bytes
font_01_sfnt_off000097e4.bin
90a6141e9fb74eb68a56880706168f92a31ae13e125f92fe066d5546affb9366
pdf-font-stream PDF embedded font (sfnt) at offset 0x97E4 9940 bytes