Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2604b05fad7813e…

MALICIOUS

PDF

40.9 KB Created: 2020-10-04 08:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 76db2e3ce2c0ad4b4382def07e097f7b SHA-1: d56b6f9b65748ffdb3ac9b3006717e17f4134b3c SHA-256: e2604b05fad7813eded41856c19fdbd7fae94d9360b6e9a3d15333da00988ed2
124 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/pify?keyword=smash+ultimate+robin', which is a known malicious redirector. This suggests the document's primary purpose is to redirect the user to a malicious site, likely as part of a phishing or scam campaign.

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.
  • 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=smash+ultimate+robin In PDF document text
    • https://site-1043771.mozfiles.com/files/1043771/22645786679.pdfIn PDF document text
    • https://site-1043239.mozfiles.com/files/1043239/gibafabudoviwojo.pdfIn PDF document text
    • https://site-1042347.mozfiles.com/files/1042347/juloruxutisimomorew.pdfIn PDF document text
    • https://site-1036646.mozfiles.com/files/1036646/bexomenatukugutevapimelot.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/39156288593.pdfIn PDF document text
    • https://site-1044009.mozfiles.com/files/1044009/kanudojo.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/a3d69740-346d-4248-bdf6-4b55f47de88e/9769263160.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/557a4550-053e-4694-b8e0-bbff1cba5049/suxevanikuwuxagifog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee36f5ae-d98c-46cc-98fb-5edb02208eb5/bodokumobadewolejafupefot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db2cdd21-6ed9-4227-9ae3-7f1dd685fc3a/79401163592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6575d40-52ff-455c-94a8-c5385a38fb74/97951129000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/paea_end_of_rotation_exam_study_guides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1630/5312/files/closed_toe_sandals_with_arch_support.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/41232080077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/tx_nr525_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2922/0504/files/mifokatajaxitefog.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_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 5168 bytes
SHA-256: 3eb0e1551ad9b2a37cca2b00160458af0c8b0bb1c970388d0e4cbf0e627767d3
font_01_sfnt_off00007432.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7432 10120 bytes
SHA-256: f1e8229621da369b788954788f064b3e8b599c9a426ad1b870cabee3e86205f9

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