Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1ff9bfc7bdea68…

MALICIOUS

PDF

49.8 KB Created: 2020-07-30 22:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb6a5af59b64dc16748bd22e2bf6baea SHA-1: 1c030e602bb08dc6667377a1f5a27fcda0757c54 SHA-256: 2c1ff9bfc7bdea68bb688bbd90f32c68798bdf7f4ce28ca70e267cffb2cc37a4
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com', which is used in conjunction with a link farm strategy. The document body, though heavily obfuscated, contains text related to 'Oreilly books pdf', suggesting a lure to entice users to click the malicious link. 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.com/pify?keyword=oreilly+books+pdf In PDF document text
    • http://files.middletonelementary.org/uploads/1/3/1/3/131380728/efad50df4.pdfIn PDF document text
    • http://files.williambartlettfineart.com/uploads/1/3/2/6/132696483/7420171.pdfIn PDF document text
    • http://files.napaneefamilyeyecare.ca/uploads/1/3/1/4/131407493/kakepezi-gosenu-xavudig-mitide.pdfIn PDF document text
    • http://files.kitsapcavy4h.com/uploads/1/3/2/6/132681928/maxixejexajit-fedivetir-walifezuwoga-pibuteminogame.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/1/0431/8032/7076/files/20167423737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1687/1326/files/89693584772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/sivapesixek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/63221464446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/48842129019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5598/8387/files/61883511235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/pukusofofumuxuno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8348/8679/files/32391307754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/kuvizebemaperer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/48492125195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4672/2974/files/47061817635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/wozikaxezakewubilovirani.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 7

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_off000086d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D1 4760 bytes
SHA-256: c603b3c502d7c1f14b30e5c40e670a33ca66217dfa7918338baad223cf835841
font_01_sfnt_off00009705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9705 10208 bytes
SHA-256: 44de034f3db1f4e30e23a2d4310c3fb574d813c0c10a84aebbbc7aed76561f1e

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