Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d34b17014aff5a6…

MALICIOUS

PDF

42.7 KB Created: 2020-08-14 21:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c510b2ddec0fd2d94194b7966031135 SHA-1: 82f7d6cfa80cb64fa3e4da8efe3c9155033dace8 SHA-256: 0d34b17014aff5a63efc9d81d8b5523dc637541ece3252553524d322234c05f0
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.com), indicating a potential distribution or phishing attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous external links and the malicious redirector strongly suggest a malicious intent, likely related to phishing or malware distribution.

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=herbalism+leveling+guide+vanilla
    • http://files.my31sisters.org/uploads/1/3/2/6/132695629/rolox.pdf
    • http://files.villagegreenla.net/uploads/1/3/0/7/130738850/3f4ac45aee9.pdf
    • http://files.outlandish-photography.com/uploads/1/3/0/7/130738803/zemotawav.pdf
    • http://files.sweetcheeksbyjulie.com/uploads/1/3/1/4/131437689/7722040.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0430/5303/files/61570468245.pdf
    • https://cdn.shopify.com/s/files/1/0431/1256/2849/files/19094814417.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/11359012645.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1589944702.pdf
    • https://cdn.shopify.com/s/files/1/0428/2089/4886/files/rotir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1551/1968/files/star_wars_core_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/19036031065.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/76835494250.pdf
    • https://cdn.shopify.com/s/files/1/0429/5966/7363/files/old_forge_web_cam.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_off000069f8.bin
170317f007ae69e5aa6b9531ca3047c55b690cc93d99e46aa78fde6e9f159f31
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F8 5304 bytes
font_01_sfnt_off00007be1.bin
3c2028a960f8c8a1b51aa2753c7e2069d0d94e5ba732f60fe5d582a384dbc26e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BE1 9900 bytes