Malicious PDF — malware analysis report

Static analysis result for SHA-256 aadbe2778fc2020e…

MALICIOUS

PDF

100.2 KB Created: 2020-12-24 01:24:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b7d618282e45caf930630405eea297ad SHA-1: 67375899f092b5aef62b8b010568f6dcc77dd8aa SHA-256: aadbe2778fc2020e5a891721b98eedee79432dafda0b024f1b41626993321b19
214 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, 'https://gettraff.ru/strik?utm_term=black+friday+tv+deals+2019+75+inch', is flagged as a malicious redirector. The document's content, though heavily obfuscated, appears to be a lure related to "Black Friday tv deals". The presence of multiple PDF links and a critical heuristic firing for a malicious redirector strongly suggests a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/strik?utm_term=black+friday+tv+deals+2019+75+inch In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_5fdc8a6f835b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387232/normal_5fa03c127c09a.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/pubirewodox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472768/normal_5fcb4c132d963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8abd4203291.pdfIn PDF document text
    • https://lelobetiladafan.weebly.com/uploads/1/3/4/4/134497055/2564999.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/rakoxusotuvifudoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_5f9b970aae03f.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/10f5446b-505c-4e9b-9443-8be0f985052c/derosutenegena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a522f56-0bf5-4cf1-bdf4-6df451e6b832/developing_the_leader_within_you_2.0.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/kabiwesisisokaxekir.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/56041001514.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_off000145ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145AB 6068 bytes
SHA-256: 38816a31ace3521613b72bf9b49b8bee8ce5cfad762439ab5a0b210880f0a1b5
font_01_sfnt_off00015a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6E 12052 bytes
SHA-256: 3ebec9656a2dbb99bea081bd4674d1d7cdf1ab6f292634e5a22756db4b848f63

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