Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda4f47aa348ec3c…

MALICIOUS

PDF

38.6 KB Created: 2020-10-21 07:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8f35865cbcf94a33fd334106c4afbd12 SHA-1: 79023e8e15052af5e8e6c64bc1e109565a1f8d94 SHA-256: cda4f47aa348ec3c9b15ada79e37edbd69d1f7e59c16261947366733e1a92335
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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=pdf+architect+pro In PDF document text
    • https://xogexemufak.weebly.com/uploads/1/3/1/4/131437987/jakore_nulipurom_tumobozonob_figozulugid.pdfIn PDF document text
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/jejezutesuvi-tulevipisa-wukotomudali-dufadenel.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/zomoko-suvevigowarifav.pdfIn PDF document text
    • https://jovofodofipepij.weebly.com/uploads/1/3/2/6/132682866/5728316.pdfIn PDF document text
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/2078437.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06875709-106e-4398-861b-9cc9166f0dbd/39397893093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2370cbd-8172-4ee4-9c2f-98277f7adf50/toxali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc100bd7-d214-418d-8808-2b8b6d58a564/64134068734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5192b6a-d847-4c8d-867f-1ff414ff3dd6/vonuwetoloxunodotijagasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6ff802-c17b-4776-8bbe-45b87cb542a7/86515393029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d829ded6-1193-4532-83f6-9dabf91dcb38/tozure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a5baa12-a002-4311-a66f-234a6a698964/tapegifedudaxojedegowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd336aa0-f30e-429b-9d81-6f24605cc9be/gagoxusulixomapozelaxof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91d4b58-c306-4fcd-ab10-3c4a4318d1e8/lisititososevuxof.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/waviwa.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/lisuzipik.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/2965745261.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F0 5032 bytes
SHA-256: 916178f707dfa0e9ce02a1bb067cfd4d73fe0b2f5c53b27493835379fd6ed547
font_01_sfnt_off00006a00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A00 10252 bytes
SHA-256: 1ec43c518e208b3c6b90e9a6a7ef34c130872635aed747430171d86addf2e4ff

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