Malicious PDF — malware analysis report

Static analysis result for SHA-256 25043f97610f9067…

MALICIOUS

PDF

56.5 KB Created: 2020-08-27 13:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d71b902946a900a04266fa114fc72d4 SHA-1: 1f46459a31fc57b28b9b163f22ed0fb9312eea4a SHA-256: 25043f97610f90679b8356f64682ab325e79abac7114adcc079c694671b29e7d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by an ML classifier and contains a significant number of embedded links. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. Another heuristic indicates a PDF link farm, suggesting the document's primary purpose is to distribute links to other potentially malicious or SEO-manipulating content. No scripts were extracted, and the document body is heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link 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.
  • 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=o+soldado+e+o+estado+por+samuel+p+hu In PDF document text
    • http://rerixew.cuddlesforclefts.com/uploads/1/3/2/8/132814969/jewigofofojitum.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/1/0431/4152/9754/files/xiwaruvamakoruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/tovirevinegidikazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/6785/4248/files/fanupizafulos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/medaninerikiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0006/2367/files/sonomatixaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/yearly_calendar_template_one_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3373/8911/files/totowom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9864/5404/files/slave_maker_game.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6879/1713/files/flagship_android_phones_with_removable_battery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/31152441036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6073/1808/files/simple_gifts_piano.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

Related samples 1

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_off000098de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98DE 5228 bytes
SHA-256: a55441db10cdab02a52b48c94b21ec37b16279e73b1ff97b16c7d617a03ad9f7
font_01_sfnt_off0000aa79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA79 13516 bytes
SHA-256: 7126316cd72eaee3afe563901fbd1e9701fba9cbdb06047cbe15c6dd65359234

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