Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca4ac8a34c89f3e…

MALICIOUS

PDF

39.4 KB Created: 2020-08-16 21:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fb8f7b92673add6a058d09442e89f0c SHA-1: 85020d11f0243429d3d0c118f71e9c643f78b289 SHA-256: 0ca4ac8a34c89f3ef9a8ac2761717d1d81bc563f77213b038aeeb6134fa77476
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to a redirector service (ttraff.cc) which is flagged as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of a link farm strategy, aiming to trick users into clicking through to potentially harmful content. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=azagaia+abc+do+preconceito In PDF document text
    • http://gulinas.recoverycafelafayette.org/uploads/1/3/1/3/131398360/fujukameku-mizejunuloz-netumidutamej.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/1/0438/9722/5368/files/bukapesiwuwirisegasatatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2480/9122/files/41617305715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/xuwanesufiraguruposox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3827/6760/files/94455231231.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/11506609336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4842/0007/files/9418099187.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8749/5322/files/79145014569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/csma_cd_and_csma_ca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/fortnite_cheat_sheet_boogie_down.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/nabedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7866/4867/files/gutitukibexazuluvitovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8574/9665/files/20088553816.pdfIn PDF document text
    • http://azagaia.bandcamp.comIn PDF document text
    • https://itunes.apple.com/us/album/cubaliwa/iIn 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_off00005bd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD9 5212 bytes
SHA-256: d01bb0b1fc95b6fa51d5f3e8adb549abb91b3d5cc58c824b8847786938ee6f89
font_01_sfnt_off00006d99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 10440 bytes
SHA-256: bc71b0ee25b236e085a1b8cb5025746a74ebbb4dca5099307e0bc05eb06d2fc2

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