Malicious PDF — malware analysis report

Static analysis result for SHA-256 745954143e16111a…

MALICIOUS

PDF

46.4 KB Created: 2020-08-08 16:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81a12edcd61c9aefe177c9c313ef016d SHA-1: 2fd3df6e067cf3864eb8642058469481c0bc9e72 SHA-256: 745954143e16111a9ae6362d984f3345ca548a8a70060d0f9f3f3180935e7746
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for phishing and malware distribution. The heuristic firings indicate the PDF is a malicious redirector and part of a link farm, suggesting an attempt to drive traffic to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to redirect users.

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=abaqus+software+pdf
    • http://files.holisticways.com.au/uploads/1/3/0/7/130775506/budotirewet.pdf
    • http://lemetuvo.irokkit.com/uploads/1/3/0/7/130738848/figudemewe-sexebilixa.pdf
    • http://files.komyoreikidonewyork.com/uploads/1/3/0/8/130874278/b7b0b72b6c.pdf
    • http://files.vibrationalcleaning.com/uploads/1/3/1/4/131438234/cb31e557a40006.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/devabukanaxewik.pdf
    • https://cdn.shopify.com/s/files/1/0428/1637/2892/files/calendrio_2020_com_feriados_nacionais_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0433/9879/1322/files/85454292515.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1487/files/84938490238.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/71506217461.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/bilurixatulu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1644/4311/files/81252260776.pdf
    • https://cdn.shopify.com/s/files/1/0434/5364/4966/files/veberakitazumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/22521017781.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/wivigumokew.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bijalikupuxamimidesedol.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_off000075c0.bin
6811a2fa92a35e7436a593bfa27589ffcfc4204b662a07d0bfdd83a544b999b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x75C0 5348 bytes
font_01_sfnt_off0000880b.bin
ee5e637a5bd0be0ba639b5a84b2ba7abd9051c406a9fb2773c92d21a277e4a58
pdf-font-stream PDF embedded font (sfnt) at offset 0x880B 10772 bytes