Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca62b55ec59ed306…

MALICIOUS

PDF

66.2 KB Created: 2020-12-19 05:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f61820b5f31e3e6bacd079fe4fa875c1 SHA-1: 8061cd7b02eb203455262808a7b32eff8ae5933a SHA-256: ca62b55ec59ed3069e3dba5952808532f58f515c50a3afdec98edd016e4cdd61
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ggtraff.ru/strik?utm_term=portable+literature+reading+reacting+writing+9th+edition+pdf+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a PDF download. The presence of multiple external links, including a link farm, suggests an attempt to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=portable+literature+reading+reacting+writing+9th+edition+pdf+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4450514/normal_5fa34c295acad.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/3656474.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf2e961e25426e1fe24de/1606284009383/sunset_ave_bakersfield_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/671ffe4f-b88f-4f21-a966-bde54e84d323/nesubetixujoze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f89a2f-76d7-4355-965a-ce1bc226333c/in_the_eye_of_the_storm_max_lucado.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6ac042e537a05ef314d38/t/5fcd156674a40730fb9efff8/1607275878821/lep_s_world_2_level_14-_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdf11113-a885-4ed0-89c0-9c23fe03b32e/what_do_ofc_mean_in_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d273e83b-e5e6-43a9-a9b0-f7169d6e941d/fiber_webquest_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc51d3bc89e1c4b8fd9e252/t/5fd1914fa9eaf43bd84e7376/1607569743324/xesosizaxadusilukeruxa.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_off0000bbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBE2 5628 bytes
SHA-256: 9d111f071a24b6f908792c123d5558c925ed00e6f86201004810b95b16db5625
font_01_sfnt_off0000cf0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0B 13940 bytes
SHA-256: 5565c4f257ecd994530e856bad170fb7b50ffc372279bb0a314a5729b640a182

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