Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a16d1625587293f…

MALICIOUS

PDF

47.6 KB Created: 2020-08-25 03:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 631fd74b3b17658e42026af6f4a266c2 SHA-1: ec4bb0420d0f62ec635bb91926a901dd103ed132 SHA-256: 2a16d1625587293f7f47137e50313f8a9529ccbd363602f35a838a6cb43ae899
194 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with a primary malicious redirector disguised as a 'category theory textbook pdf' download. This link, https://ttraff.cc/pify?keyword=category+theory+textbook+pdf, leads to known malicious infrastructure. The document's structure and embedded links suggest a social engineering tactic to drive traffic to potentially malicious sites.

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=category+theory+textbook+pdf In PDF document text
    • http://files.thebeekeepernv.com/uploads/1/3/1/3/131398547/wakuduvuludalu-lametejusef-memidab-rekom.pdfIn PDF document text
    • http://files.lancerdevault.com/uploads/1/3/1/8/131871488/lenuzizenafulita.pdfIn PDF document text
    • http://vomewaki.merrimackreview.com/uploads/1/3/0/8/130814088/xerinerepok.pdfIn PDF document text
    • http://files.createwithkenz.com/uploads/1/3/1/1/131164358/2087870.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9724/4316/files/john_deere_l110_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/kekesuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7228/3033/files/believer_sheet_music_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/51375318591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/brainspace_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8621/6352/files/android_10_samsung_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5025/1941/files/70340000139.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0669/files/natugevumofofodore.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3353/2315/files/52270512952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3868/7900/files/61081036462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7571/4715/files/3895932313.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E82 5124 bytes
SHA-256: 60500170e95d72e42ff57b03ac2c24a4061802ec3247ad41833fc49c64626514
font_01_sfnt_off00008012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8012 10296 bytes
SHA-256: 0835a345df21d75ec7588874805120fe86001b35820fb75e8069c8fdc7ecdeff
font_02_sfnt_off0000a350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA350 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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