Malicious PDF — malware analysis report

Static analysis result for SHA-256 73679a4d0e9787fe…

MALICIOUS

PDF

41.9 KB Created: 2020-08-29 19:56:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e348789b50c69d9abb22ef70a63923e SHA-1: 84c8691826d3d1419ac2e7ade3b86d9b53f03b7c SHA-256: 73679a4d0e9787fe35866d89a002d9cec8e859745a992e940a55b1f8aa2aa23f
154 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL https://ttraff.cc/wix. The document body, though partially corrupted, suggests a lure related to software, likely to trick users into clicking the malicious link. The presence of numerous embedded links, many pointing to benign Shopify URLs but one critical redirector, indicates a phishing or malware distribution attempt.

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/wix?keyword=time+attendance+management+v+2008+espa%25C3%25B1ol
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/47221069280.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/38076769085.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/wuxumebemaremipuwazoli.pdf
    • https://static.usrfiles.com/ugd/a1fb72_5e4e5f268bea4eadb0735810456919aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fa031943cc14e4887eb4feb4f9d60d0.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_9282e1e3ae93422891bc271f6056e552.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ed621cae4ff4374b95ba5c56f3b0acf.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/85364847919.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/jijudalola.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/vofikelawot.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80278007767.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000545b.bin
dcae52b0b8b4d9ae00f3d1af7e637a63d018d0b9a1469ee0edd7e6170f18bbb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x545B 5772 bytes
font_01_sfnt_off000067a9.bin
273069064e2dd93ddfbe035dafb2441b14250f275ec4b57f2b57cb31c74f6cc7
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A9 10264 bytes
font_02_sfnt_off00008a84.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A84 4324 bytes