Malicious PDF — malware analysis report

Static analysis result for SHA-256 611a15a1b5d07974…

MALICIOUS

PDF

70.6 KB Created: 2020-12-23 01:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: fc36ad6ffa57ab230ffc7241928e0da5 SHA-1: bf90af607fd137d46f874ae954ed61a06e831c88 SHA-256: 611a15a1b5d0797404d44432ac174b4d947301e3eef2df0d38a9f407f9511b3d
96 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links points to 'trafffe.ru', which is flagged as suspicious. The embedded document body, though heavily obfuscated, contains text related to 'Amazon small gold hoops' and the authoring application, suggesting a lure to a potentially malicious website. The presence of numerous external links indicates an attempt to manipulate search engine results or redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/strik?utm_term=amazon+small+gold+hoops PDF link annotation
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/wiganojeladutu.pdfIn PDF document text
    • https://guzebiba.weebly.com/uploads/1/3/4/3/134368687/7414859.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe246a4f98375720a99016/1606296683345/definitive_guide_to_dax_second_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2c3c5b7bc966055df3f1/t/5fde3ea351a86c1b6c1c9e37/1608400548036/maradona_songs_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb614559-8e41-4ebd-9159-5aa899bc84a3/el_paso_county_colorado_assessors.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf4b493f7a7c1e6e8b3d83/t/5fd1568487bef85997ddc83c/1607554692964/65995063203.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e410af5-039a-42b7-8352-3b81bb2acaae/robaxiropilatevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc38c0cea4a794d5655cf02/t/5fcb7b727ab0f364abad0bed/1607170931202/68454774943.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd2b2255b18a2b82c09c96/t/5fddc6f3d85ca26442f0f7ed/1608369909019/brothers_in_arms_3_hack_game.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/facc7b90-8372-4939-b413-c2eadfe78ff8/64837865383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cc098fd-328b-4615-be3c-b0b8f4d6e3af/27454204252.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0683f81c9a2a0c691a72/1606289037151/60071910780.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe08013f75b166439c26e7/1606289413638/99916966509.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_off0000cafa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFA 4860 bytes
SHA-256: 1463c67be4b219c2ef20c9311c35bbc60873648b779aef63288a6bf3ae25cbd2
font_01_sfnt_off0000db3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3F 10688 bytes
SHA-256: a2c9b869d2ac68a57ea061cdd277d4ba74f0962432b97e38c4763d1fe413bfcc
font_02_sfnt_off0000ff98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF98 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2