Malicious PDF — malware analysis report

Static analysis result for SHA-256 4348aa6f2e63f541…

MALICIOUS

PDF

43.5 KB Created: 2020-10-30 12:16:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f07c44631eb22f19bd5c954892032513 SHA-1: e4a2361d6183f1039685ae67de16896403c893a5 SHA-256: 4348aa6f2e63f5410c37a13b36909d8623f88044c47ee676bced238b402665a7
134 Risk Score

Malware Insights

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

The PDF contains a link disguised as a TV guide, which is a common lure for phishing attacks. The embedded URL, https://ttraff.ru/123?keyword=cable+one+roswell+nm+tv+guide, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is designed to redirect users to harmful content.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=cable+one+roswell+nm+tv+guide In PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/fuwitob-dabafib.pdfIn PDF document text
    • https://noloturajikule.weebly.com/uploads/1/3/4/4/134486045/6939654.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/52c71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2775/7216/files/idle_heroes_mod_apk_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0183/9267/files/muludunuza.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/71782916854.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8db4c7a1-d2dd-49c9-8699-d0daa5157486/xukos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4662/8259/files/tapisewitejurabekop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8315/6635/files/zarijomupaxokikak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16d74bee-06bf-4a42-b159-58e983e339ff/rojititufikiwitamolarijo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/39582918189.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/tronical_tune_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5217/0908/files/quantitative_research_study.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_off00006a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7D 5340 bytes
SHA-256: 75782b3dbacc31ee4a9638c552bb8772fca33a3d89bad52c515ee4d95cff67a4
font_01_sfnt_off00007c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9D 10796 bytes
SHA-256: fe71ff5438a9c9650c802096ebad5604db2dfb7a042eb858d2a4568217f7d61d