Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e22daac81fc2cf…

MALICIOUS

PDF

43.0 KB Created: 2020-10-01 04:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e83ae14080c34b667428beeb28331ada SHA-1: 7a5a04a0d454f50d331429faac117271414736e5 SHA-256: e0e22daac81fc2cf4d1c1531ac2e8e4a8676dbc5644f49232f18a3b790d7037a
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 redirector infrastructure designed to lead users to malicious sites. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'reasoning and computer aptitude questions', further suggesting a phishing or scam attempt. The presence of numerous external links and a critical redirector link strongly indicates malicious intent.

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/strik?keyword=reasoning+and+computer+aptitude+questions+and+answers+pdf In PDF document text
    • http://files.lansingweddingdjs.com/uploads/1/3/1/6/131607712/votejalini-bemugolawolewi-migetikitalugi-zezoneb.pdfIn PDF document text
    • http://files.antoniellaapparel.com/uploads/1/3/0/7/130739480/218756.pdfIn PDF document text
    • http://files.sharonkitzis.com/uploads/1/3/2/8/132814048/kavofanuv.pdfIn PDF document text
    • https://site-1037035.mozfiles.com/files/1037035/lideraxowixuwunodokagiwex.pdfIn PDF document text
    • https://site-1037283.mozfiles.com/files/1037283/manus.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/43d8e216-f025-4714-97d0-7ab7c742ee88/33008106120.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e8d3bc0-97f2-40b7-b9d3-8fca2d166d81/37402906718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b3f53d7-490d-4c74-b0a8-203340316d6f/farera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2c5d07-0c5d-4b92-a796-6b33ef69333c/53007971841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8765/files/4046310153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0147/9321/files/32072053368.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000590e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590E 5552 bytes
SHA-256: 8966f8e9c086847fd35d4a60d365e4dc7714c0eca722f331b0dc7a79a44d13c3
font_01_sfnt_off00006be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE5 10976 bytes
SHA-256: 446eed6f4fde0f9c7b98be2a4fd95b40528f6dbb715e858566aba940166a9a84
font_02_sfnt_off00009102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9102 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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