Malicious PDF — malware analysis report

Static analysis result for SHA-256 614d13e68ef6844b…

MALICIOUS

PDF

46.9 KB Created: 2020-08-14 14:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62beacb70d8f50fa36e06b352285a639 SHA-1: 2c80fe75ff17574ab5c1187713ae62931a2b4ff3 SHA-256: 614d13e68ef6844b4e38bc430d55b2446c1c59737464f86e0462cf017a2b2ae3
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The document body also contains a URL that appears to be a lure for 'auto clicker mac os', which redirects to the malicious domain. The presence of numerous external PDF links, as flagged by PDF_SEO_LINK_FARM, suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.ru/pify?keyword=auto+clicker++mac+os
    • http://files.purejoylabradors.com/uploads/1/3/0/9/130969990/8496807.pdf
    • http://files.creativitycards.net/uploads/1/3/2/6/132681482/fcce0.pdf
    • http://files.lauranaumann.com/uploads/1/3/2/6/132680784/birulapo-fawazoladetu.pdf
    • http://pewosim.vowswithangie.net/uploads/1/3/2/6/132681946/walaboj.pdf
    • http://files.williamreimann.com/uploads/1/3/1/3/131384470/godoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/5969/9109/files/gujusajiwafat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/potiwabuvufepatene.pdf
    • https://cdn.shopify.com/s/files/1/0444/3347/3703/files/postpartum_depression_questionnaire.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/fulejabixe.pdf
    • https://cdn.shopify.com/s/files/1/0429/4210/3719/files/lepidoptera_families.pdf
    • https://cdn.shopify.com/s/files/1/0437/1464/2074/files/guropetalusudenavilolulu.pdf
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/zibuvoderaxuvasozupiz.pdf
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/apache_nifi_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0439/5050/6152/files/bamupitinuwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4474/1024/files/97691377722.pdf
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/pivuluvifopexozagejom.pdf
    • https://cdn.shopify.com/s/files/1/0434/7851/5864/files/21121388554.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_off00006d4f.bin
386ee57a672998b735b3671d2ede3514291c5f05dcb1b8de98f922b28287c22b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D4F 4772 bytes
font_01_sfnt_off00007d7f.bin
a53c5ceb8db79021b6cc554899bd4ee4839b7a39488a7e209cd0630ccd4e1a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7F 10312 bytes
font_02_sfnt_off0000a0b6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0B6 4324 bytes

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