Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a5f400e6434bea…

MALICIOUS

PDF

40.1 KB Created: 2020-07-30 16:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39e2e1a86be81e828e484ab7859cc00c SHA-1: 612df9da9e455e9b94fa67b71bbdca780b13e124 SHA-256: 72a5f400e6434bea0c147e21db2085c6d6e16c4e6f26d92f03c89f1c916b73d0
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. It also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=career+cluster+test+pdf
    • http://files.precisiondental-nj.com/uploads/1/3/1/6/131606502/bukogubapoveliwogel.pdf
    • http://files.asmorangecoast.com/uploads/1/3/1/4/131407096/vujepagise.pdf
    • http://files.morrisonumc.com/uploads/1/3/1/3/131379477/4488823.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/3885/0719/files/gesiduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5246/6325/files/76470334210.pdf
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/zexufarud.pdf
    • https://cdn.shopify.com/s/files/1/0433/9712/0154/files/bumitunovopapuso.pdf
    • https://cdn.shopify.com/s/files/1/0431/9107/4976/files/xutafugijirifafifojer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/bidikujemuwepajodo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/24546801265.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1997/files/lavotogevesexiwefijumuriz.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_off00006215.bin
1a9c5f11bb41a148b6c3f2414f094c2786fd201a76361a5eb923184e0154b791
pdf-font-stream PDF embedded font (sfnt) at offset 0x6215 4792 bytes
font_01_sfnt_off00007276.bin
011edfaeca9409c684d3f5b028433448e1f0bd428b774e09aa881f3f0ad2eb17
pdf-font-stream PDF embedded font (sfnt) at offset 0x7276 9760 bytes