Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd01aaf1e4d417ed…

MALICIOUS

PDF

62.8 KB Created: 2020-10-12 12:11:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: bb9f4e82ac58d610f7a1771df6b958b1 SHA-1: dbada6080aaa0080b5d97c89ced08a79a437a116 SHA-256: bd01aaf1e4d417ed8a02676251b308b14c9b8cf943ee460461399ab4e5dd135f
184 Risk Score

Malware Insights

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

This PDF file functions as a link farm, containing numerous links to other PDF documents hosted on disposable domains. The primary link directs users to 'https://ttraff.club/pify?keyword=engineering+physics+interference+of+light+pdf', which is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to manipulate search engine results or lure users to malicious infrastructure, likely for phishing or malware distribution.

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.club/pify?keyword=engineering+physics+interference+of+light+pdf In PDF document text
    • https://site-1038998.mozfiles.com/files/1038998/22087328837.pdfIn PDF document text
    • https://site-1040528.mozfiles.com/files/1040528/koribevadenovufelubed.pdfIn PDF document text
    • https://site-1036640.mozfiles.com/files/1036640/69003289935.pdfIn PDF document text
    • https://site-1038690.mozfiles.com/files/1038690/foniromigiworopuze.pdfIn PDF document text
    • https://site-1043205.mozfiles.com/files/1043205/52315835755.pdfIn PDF document text
    • http://files.jjennahuppandrews.net/uploads/1/3/1/1/131163962/pozob.pdfIn PDF document text
    • http://files.fbcoxfordfl.org/uploads/1/3/1/3/131379456/mikugosom_xisegus.pdfIn PDF document text
    • http://files.chippewavalleyleatherworks.com/uploads/1/3/1/6/131637640/ecb9d445db7d19.pdfIn PDF document text
    • http://files.redigovideo.com/uploads/1/3/1/4/131453431/gatoxizovapala.pdfIn PDF document text
    • http://files.asiamoneyhub.com/uploads/1/3/2/6/132695620/9951056.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/b77e7df4-773c-4126-97cb-0e1a72db8b69/44217446802.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1dc5c9-d45e-4b37-87bc-81da25a120b1/51607293063.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_off00009dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD4 8700 bytes
SHA-256: 1590459dbcf806619e6f1a4e536cdf7b4de8b961fd1c96bf5310346b89256459
font_01_sfnt_off0000b671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB671 5268 bytes
SHA-256: 5ec731df2fe7be1042b99c9c9cac6fd447e4186c0064c740775e96e6e6311259
font_02_sfnt_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 11052 bytes
SHA-256: 824440735b7578f08b7d419360b261a4870039b88ad9605f09efa4906e53d9d1

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