Malicious PDF — malware analysis report

Static analysis result for SHA-256 1547817719938293…

MALICIOUS

PDF

41.3 KB Created: 2020-08-29 19:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0dad30a28bfd3f2d97ad5f9834027ff0 SHA-1: f7d1266804c556c2b4645a91feddc421b361f65f SHA-256: 1547817719938293c8646c4e51e2a973cd8c14d51b7da9c86578be158db6552d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's content, though obfuscated, appears to be a lure related to 'la guerre de cent ans' (the Hundred Years' War), likely intended to trick users into clicking the malicious link. No scripts were extracted, but the presence of a malicious redirector URL is a high-priority indicator.

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=evaluation+cm1+la+guerre+de+cent+ans
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/gilexezejevag.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/64262599657.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/59658787013.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/tonebijakobakikuzala.pdf
    • https://static.usrfiles.com/ugd/b8c837_baa8a104365144aca3b6f00fa7886710.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_860d933ee438401f8d8845e69c6b883a.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bf7263bb05a4677a9a3ee81b261f641.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbaeaea4b804489d93f29cc5b707b7c5.pdf
    • https://static.usrfiles.com/ugd/d55797_fd7c759c45e447909cd63acf29fa2018.pdf
    • https://static.usrfiles.com/ugd/5be868_7a86f7c6a0fe4126af378fe8cd919627.pdf
    • https://static.usrfiles.com/ugd/b8c837_1112bd4c0fe44668bc639dba48c50f67.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/gojowodalaxovetog.pdf
    • https://cdn.shopify.com/s/files/1/0432/4913/9880/files/bopux.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/half_day_casual_leave_application.pdf
    • https://cdn.shopify.com/s/files/1/0430/8231/7975/files/16875479327.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_off00005d9e.bin
f6e8b0d3f5d4930a7d38cf1164844a3d400867978f829f596f7ea9205835acfd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 5328 bytes
font_01_sfnt_off00006fab.bin
8530c4133679e99014c286af89bcd45a7d8261cb726655ec4f9943e577b72678
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAB 12384 bytes