Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6026a9cdcdcccc…

MALICIOUS

PDF

42.6 KB Created: 2020-08-08 07:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2348b17d07986b63258053475a17a234 SHA-1: 293844a133ea6d630d6fbe274b8dc3aead50d8f5 SHA-256: 1e6026a9cdcdcccc010203afe42a824d01fd774233cda285fc99fecf15559aa8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=hebrew+alphabet+meaning+pdf' which is flagged as a malicious redirector. The presence of numerous links, including those disguised as PDF manuals, suggests a phishing or content-luring attack pattern designed to redirect users to malicious infrastructure.

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=hebrew+alphabet+meaning+pdf
    • http://files.desmoinesmta.org/uploads/1/3/0/7/130775768/nusazom.pdf
    • http://files.cafemaxxonline.com/uploads/1/3/1/6/131606027/b5a8aab7.pdf
    • http://files.twistedoakandco.com/uploads/1/3/1/6/131637190/gebafixorobumab-kufuw-wekakik.pdf
    • https://cdn.shopify.com/s/files/1/0429/8784/7843/files/81084041135.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/diwisosolumuto.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97242885008.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/21684120424.pdf
    • https://cdn.shopify.com/s/files/1/0428/5743/1196/files/timex_ironman_triathlon_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/80543629520.pdf
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/appcoda_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/zusonipigex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ninitegabi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lenibokufilitixesokan.pdf
    • https://cdn.shopify.com/s/files/1/0437/1329/8581/files/kozaputela.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/
    • https://cdn.shopify.com/s/files/1/0428/972

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006730.bin
588bc7feeac41fc24b3016fa3245afa48fad189c2e5428edad122b63b9d81531
pdf-font-stream PDF embedded font (sfnt) at offset 0x6730 5468 bytes
font_01_sfnt_off000079ad.bin
dc42734061510d73b799dd4a4e3d8a12e60a13acf54a4c455be07cb7d62995cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x79AD 10476 bytes