Malicious PDF — malware analysis report

Static analysis result for SHA-256 158cc31e6ff65574…

MALICIOUS

PDF

44.0 KB Created: 2020-08-25 17:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9844a2d0d6f3fa1ce934cd5b5e41f16a SHA-1: c474768dfef00e7b3b16ca26b4d8ba1cb135a18a SHA-256: 158cc31e6ff65574c8ed27a07eb70b265e7c808a59501fc787842d7c3e137b49
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body also contains this URL, suggesting an attempt to trick users into clicking it. While no scripts were extracted, the presence of numerous embedded PDF links, many pointing to unknown or potentially malicious domains, indicates a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=service+blueprint+template+restaurant
    • http://dawigo.justinedaisuke.com/uploads/1/3/2/6/132695780/2b81ae5d.pdf
    • http://files.centralmissouricarpenters.org/uploads/1/3/1/3/131378991/gowumaxiwunufi.pdf
    • http://files.bold-essentials.com/uploads/1/3/2/6/132682040/loradonol.pdf
    • http://kaxonoro.francais.brainintegration.net/uploads/1/3/0/7/130739163/gobin.pdf
    • http://files.jdstackroom.com/uploads/1/3/2/6/132681985/xuxukane.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7445/2632/files/google_maps_geolocation_api_android_example.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/46579901109.pdf
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/gebidiwemodujilal.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/49608409290.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/bashan_250_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/xokali.pdf
    • https://cdn.shopify.com/s/files/1/0435/5850/2563/files/35906652053.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/91652857085.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_off00006e9b.bin
c66cd959fe751db59152f294d4a202064e9fce6ede1858df1ce55a8df595aae0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9B 5380 bytes
font_01_sfnt_off000080c7.bin
fae115d48d32d1bcfce7b70da5af79200c0f6b7bd923bdb58638f7b1817486f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 10008 bytes