Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe97127573a4598…

MALICIOUS

PDF

43.8 KB Created: 2020-11-05 13:46:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 58517d1d53fa9a31af725869cc562894 SHA-1: 1ec194858c937c3b4ba115717250b93249b7032d SHA-256: 1fe97127573a459855c41454e582190aadfe356f155fab2346740b8e2a844f16
154 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a large number of external links, indicating it may be part of an SEO link farm or used for redirection to malicious content. One of the embedded URLs, 'https://ttraff.ru/123?keyword=the+economy+of+colonial+virginia', is explicitly identified as a malicious redirector. While no scripts were extracted, the overall structure and link distribution suggest a malicious intent to lure users or manipulate search engine rankings.

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/123?keyword=the+economy+of+colonial+virginia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_5f9ad0cab1358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_5f944fa754caf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372753/normal_5f8d80cd9bac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415061/normal_5f95915e64b28.pdfIn PDF document text
    • https://sopudediliwaweg.weebly.com/uploads/1/3/4/5/134587721/kuxodijojutasigof.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/2122744.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_5f8f77830ae38.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/7b6ea0.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/87fca033.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/53d6d0e2-8390-4ada-92ab-99f74ff2580a/3949008888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03438888-e25d-46ab-ab20-211e7f15b23f/24434544557.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a01885c-19e7-4ec1-9f2b-908b11b5effa/viseviva.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/4025307164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/549827fe-2bc6-4561-ba8f-78783991c093/41616160668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e349ffc-c844-4a22-b86c-e8153912e8c4/7007638461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be2f7ded-8de1-464b-a137-ed36a7754bab/capitulo_4a_adonde_vas_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f656e56-cde6-4c1c-ad29-b5d4b7f33148/free_hack_wifi_password_pro_apk.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_off00006dc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC4 5228 bytes
SHA-256: 369a8f8851868dbc4df3b13b22b2965eb0b35b6cf5c2ebf79c546e3f9f5aa80b
font_01_sfnt_off00007f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7C 10104 bytes
SHA-256: ccafa5733c5b81de7989adc4a93d6b4a13eb4a52bf646290adca40d51b85138c

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