Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f43ea6bc6f5ce12…

MALICIOUS

PDF

42.2 KB Created: 2020-08-25 06:17:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15533ae89c8ff05e598dd342059e8087 SHA-1: ceacee21580bd0c7b2b0c6c3136e09138130a0dc SHA-256: 6f43ea6bc6f5ce126c87f91a856f932aaa77e91371477e6dca906a5d811aac24
154 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating an attempt to direct users to harmful content. The ML classifier strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a malicious intent to redirect users, likely as part of a phishing or malware distribution scheme.

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.ru/pify?keyword=financial+report+analysis+definition
    • http://wezoberoz.pureexistencedance.com/uploads/1/3/0/7/130739892/4077893.pdf
    • http://wojugeti.cluminouseyecare.com/uploads/1/3/0/7/130738721/2222304.pdf
    • http://files.chriscuzoh.com/uploads/1/3/2/7/132712483/zadaf-fepejufuw-jadepis.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81579197248.pdf
    • https://cdn.shopify.com/s/files/1/0438/0740/8290/files/kaxig.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/child_handwriting_fonts.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/entertainment_rigging_harry_donovan.pdf
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/53428726168.pdf
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/kudanumuzas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3074/0135/files/28447321692.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/67951499364.pdf
    • https://cdn.shopify.com/s/files/1/0431/8003/2160/files/depuso.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4708/files/pebovavi.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8742/files/hamlet_monologue.pdf
    • https://cdn.shopify.com/s/files/1/0429/7333/1609/files/64835214822.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_off00006763.bin
53c582f58fad9c22a4e298648e3c5cba119de12ff3248503b8af67fc5da9af41
pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 5204 bytes
font_01_sfnt_off00007922.bin
ee9b6f48407e59ce69a7cb051b146b3de4af4553e5354c0ec0eb1ade71f06deb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7922 10192 bytes