Malicious PDF — malware analysis report

Static analysis result for SHA-256 aafba460e1df842c…

MALICIOUS

PDF

69.2 KB Created: 2020-10-07 23:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7d2462402956bad405d23b3914b0d187 SHA-1: dbe04bcba0161911683d9447d9170e02e51e9f8f SHA-256: aafba460e1df842cc69127e7ada9e0b6bdecb687363b7f3e129f83ff6e1c9ab3
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous other PDF links suggests a link farm used for SEO poisoning to attract victims.

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=revelation+bible+study+in+tamil+pdf In PDF document text
    • https://site-1038717.mozfiles.com/files/1038717/taguluwo.pdfIn PDF document text
    • https://site-1036886.mozfiles.com/files/1036886/zazefobarogawojososajive.pdfIn PDF document text
    • https://site-1039203.mozfiles.com/files/1039203/18013325273.pdfIn PDF document text
    • https://site-1036838.mozfiles.com/files/1036838/47282251924.pdfIn PDF document text
    • http://zolidilip.sunnysidemusicdept.com/uploads/1/3/0/7/130775192/7767008.pdfIn PDF document text
    • http://files.beautifuljourneybirthservices.com/uploads/1/3/1/6/131637529/205678.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/8a78ad44-f5cb-42f9-aa9f-a0b43f9cab98/14039072839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f98184ca-976d-4c73-b369-d9101c317a78/nileze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/750b653b-d97f-4c4d-b322-8892e6cd0cd5/73898249553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/858a777a-f9b8-4013-876c-ebf5cf2ead5d/wivavemigudelesu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6edcb54d-0c05-4413-90d0-fc289ba2b09e/tiwugidudekit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/188ea332-07f0-4bc3-acfe-5c911ae141ca/kanevivevelanun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7aa0e31-2f18-47c3-ae10-1795bc90bfa7/babevoxesorujupo.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_off0000d104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD104 5400 bytes
SHA-256: 21a2c01f533a6b09d7099c57c4a6c5c2e0b71763360c82c1196913077e92d83d
font_01_sfnt_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 10932 bytes
SHA-256: 8d0f7c3c5fea7f36c019633ae64995be85c476436bf10a3ce7cba14696dc917f

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