Malicious PDF — malware analysis report

Static analysis result for SHA-256 54443c33f9f2dfe6…

MALICIOUS

PDF

43.5 KB Created: 2020-11-03 10:55:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2069b7cdbf80ac84645e9245e201695e SHA-1: 13b87e30384049f16bd7225a6d96e6aa3cd5bb4b SHA-256: 54443c33f9f2dfe676fc933649ca151fc76c18c6edfad54c0e55e9489c8405a6
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 link farms or redirectors, indicating a phishing or malicious content distribution attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to potentially harmful infrastructure. While no scripts were extracted, the document's structure and embedded links strongly suggest it's designed to redirect users to malicious sites, likely as part of a phishing campaign.

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://gettraff.ru/123?keyword=call+of+duty+world+at+war+mods+zombie+maps
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/5397985.pdf
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/0448f27c.pdf
    • https://zikavudosun.weebly.com/uploads/1/3/4/3/134329779/6a4b31e3be1924.pdf
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8ef6e36d500.pdf
    • https://cdn-cms.f-static.net/uploads/4369162/normal_5f97fa849c18b.pdf
    • https://laguvibokabab.weebly.com/uploads/1/3/4/3/134383318/fadewugujujuxiv-zoraxexat.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juvuraguvutoxif/max_dirt_bike_3_unblocked.pdf
    • https://uploads.strikinglycdn.com/files/e1d30bf7-5182-4df5-9bd4-4e49f93ce9f1/vagewetojamuzamutimodag.pdf
    • https://s3.amazonaws.com/begijufadi/tibezutolokamivap.pdf
    • https://s3.amazonaws.com/vatosolikijike/10545152135.pdf
    • https://uploads.strikinglycdn.com/files/8cb67bac-0ce6-415b-85c9-0d1fe0a08d7b/livek.pdf
    • https://s3.amazonaws.com/rixevozajixezos/55882875747.pdf
    • https://s3.amazonaws.com/leguvefu/60863997422.pdf
    • https://uploads.strikinglycdn.com/files/f72135ee-7da8-45a4-ad62-7c3177770ee7/likatipepoxoxitu.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_off00006b0b.bin
2019ab5f11d8566eca496b4cb4d6c7291981c9fcc7c777f93f624045583f6ba2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0B 5476 bytes
font_01_sfnt_off00007dae.bin
2a6d619d3f1faf0e3f4b34ff1ca9de1db03dbf1950c71d85ee0010003e306cb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7DAE 10192 bytes