Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cc3afede7a6133d…

MALICIOUS

PDF

45.2 KB Created: 2020-10-05 00:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7b379d983b70636e4b772adada7ac3f9 SHA-1: 773cdf1d1c63aa9efb092d5417ce512eab5de7f1 SHA-256: 3cc3afede7a6133dba39f5dd1c204ef82be82b13d020f5e1364f0accb841d291
184 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm hosted on disposable infrastructure. One prominent link, 'https://ttraff.link/pify?keyword=grand+junction+tv+guide', suggests a lure related to a TV guide, likely intended for SEO poisoning or phishing. The ML classifier strongly indicated maliciousness, and the presence of redirector links further supports a malicious intent to direct users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.link/pify?keyword=grand+junction+tv+guide In PDF document text
    • https://site-1037074.mozfiles.com/files/1037074/laxavinizegepovisow.pdfIn PDF document text
    • https://site-1039892.mozfiles.com/files/1039892/30733141696.pdfIn PDF document text
    • https://site-1037096.mozfiles.com/files/1037096/36870559712.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/jikanezuvesemifofopazi.pdfIn PDF document text
    • https://site-1042716.mozfiles.com/files/1042716/zojalejakipopozodafem.pdfIn PDF document text
    • http://sonuvu.movingclay.com/uploads/1/3/1/8/131857114/8084337.pdfIn PDF document text
    • http://files.tactileearth.com/uploads/1/3/1/4/131438501/9015120.pdfIn PDF document text
    • http://navira.amyopry.com/uploads/1/3/2/3/132302870/7144318.pdfIn PDF document text
    • http://files.isstx.com/uploads/1/3/1/3/131398406/0388c8e17721.pdfIn PDF document text
    • http://files.jkamontville.org/uploads/1/3/0/7/130775334/refulamujomipukez.pdfIn PDF document text
    • http://files.mrsrobinsmusic.com/uploads/1/3/0/8/130873838/2699354.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/ec7148db-7071-4aad-a9dc-1bd61138a507/20732124514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a97d6c-a974-49fd-89d9-56c90feaabea/25448543969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2f1d784-3e47-4ce4-828f-0800da0e0d33/jasevaxotemezenuz.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_off000071c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71C7 5064 bytes
SHA-256: 11c5b285e8c698557d4477cbd58e8032d8655ba2ab3e69fd34bf8687e555c240
font_01_sfnt_off00008322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8322 10860 bytes
SHA-256: 173b41fd06f695e47eb5975f4ff769616348273509ad60530e14f1f19d65db89

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