Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea53dc3d5e87863…

MALICIOUS

PDF

60.4 KB Created: 2020-11-03 16:43:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d680273de87259e0b89aff76c3b5311 SHA-1: ef2475fc93e11c52d30086482344cf9d10fa8635 SHA-256: 4ea53dc3d5e8786354ff4f3c6296490eacd66a58913721e51c82b389bec67833
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 the URL https://cctraff.ru/strik?keyword=tabernacle+prayer+guide+mangun. It also exhibits characteristics of a PDF link farm, with numerous embedded links to external documents. The document body, though partially obfuscated, contains the malicious URL and appears to be a lure for prayer-related content, suggesting a phishing or malware distribution attempt.

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://cctraff.ru/strik?keyword=tabernacle+prayer+guide+mangun
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdf
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f8e402e37fd4.pdf
    • https://cdn-cms.f-static.net/uploads/4379723/normal_5f8c3824be8d0.pdf
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8d84f59626e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/jamokaroxoj/statistical_methods_for_agricultural_research.pdf
    • https://s3.amazonaws.com/tigovatolis/cricket_information.pdf
    • https://s3.amazonaws.com/somamere/30969293419.pdf
    • https://s3.amazonaws.com/ninasivol/monkey_defense_5.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/amazon_aws_tutorial.pdf
    • https://s3.amazonaws.com/tabobujimo/zowaz.pdf
    • https://s3.amazonaws.com/wujodibu/ps_i_love_you_google_drive.pdf
    • https://s3.amazonaws.com/xojafemori/st_francis_xavier_catholic_church_cresson_pa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a2bc.bin
498f76f88feae3570c6aff14abd0b0e30001761b9a04ee0b86b31c0dac04b07b
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2BC 5096 bytes
font_01_sfnt_off0000b3ed.bin
197306f94c927f0eb59859d450bbc7121f1c1dc6f76e046290d1485176f71b76
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3ED 10288 bytes
font_02_sfnt_off0000d6e9.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E9 4324 bytes