Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1443043a7b58901…

MALICIOUS

PDF

41.5 KB Created: 2020-09-13 19:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03ad7a651b8aaabbcc486ec8cadd4ef7 SHA-1: 6f693a2405ec4b656500adff80dc986e7fbed227 SHA-256: c1443043a7b58901995e03df74e829454bc2e88abe6686909aa03f2926578e28
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.com'. The document body, though partially corrupted, contains text related to 'unblocked games' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF also contains a mass external link farm, with many links pointing to 'static.usrfiles.com', indicating a potential SEO poisoning or link distribution tactic. The ML classifier also flagged this PDF with high confidence.

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.
  • 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.com/wix?keyword=unblocked+games+76+super+smash+flash+3 In PDF document text
    • http://files.riannawalcott.com/uploads/1/3/0/7/130775867/nesaxudup.pdfIn PDF document text
    • http://kaxor.prepvisionconsulting.com/uploads/1/3/0/7/130738638/tovazixinopupe.pdfIn PDF document text
    • http://files.onedocs.co.uk/uploads/1/3/0/7/130739839/fasop_waperefanidugos_xojajumu_gixubukakad.pdfIn PDF document text
    • http://files.thirdcinemaproductions.com/uploads/1/3/0/7/130775784/4001601.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/55f640_1635ec2ed6fe4a4b9b4acd3aaa741856.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3aca14_3fc742f1c4854f1986adddd52b55a957.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0bcf16_792175cabbcf4d7baef59d2478a98023.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e1c37d_47bdbb2f760441f186e7c917a26a3700.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf392_7fdb816904454275bebb4ca27fd6fc13.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/atmel_atmega328p_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/givojabadanibot.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/af0aa9_1b09cfc04e094870aca873d29a309bd1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8e6e76_bf7c1a21c3624e1faafa57ba7f83e674.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9a242c_e0e0c8a58cc64e859f8be74932c121b7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/704f6c_0e9cf283b8bc4e8194524d1a90737a6a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a8cc01_8c1c1b27a66947108f52f1ef12af352e.pdfIn PDF document text
    • https://sites.google.com/site/unblockedgamesbolich/portal-2In 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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 6164 bytes
SHA-256: de436c49f77fba0db3c1a27b440639dbbe7dac106a9d53e952170358a0b2a782
font_01_sfnt_off000075af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75AF 10380 bytes
SHA-256: b3ef5cd09b5c5ca8914b09de697aaa57dceef3840c0d2a30ddbd047425044f84

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