Malicious PDF — malware analysis report

Static analysis result for SHA-256 d618d61bd867d5ab…

MALICIOUS

PDF

36.1 KB Created: 2020-08-12 00:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: facfe205823fc0c1c6b5629f16141283 SHA-1: 246bc82bf173797bce386b06d25c9f5114d109ef SHA-256: d618d61bd867d5abe52321368c1f7399dd0f06e419ece624e551ea67553d2feb
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. Additionally, it contains a large number of embedded external PDF links, characteristic of a link farm. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious content via the 'ttraff.com' URL.

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=e+spanier+algebraic+topology+pdf In PDF document text
    • http://files.liwaterways.com/uploads/1/3/0/9/130969211/501d90.pdfIn PDF document text
    • http://files.howsafeisourcare.com/uploads/1/3/2/6/132681992/mikezijakoketof.pdfIn PDF document text
    • http://files.chalkbychels.com/uploads/1/3/1/3/131379113/a270afd5c7.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/1/0432/7197/9172/files/kagazifepuwupofupugemetev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4787/0876/files/47203158584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bifezunelavezide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/15681600719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3438/6332/files/hole_s_essentials_of_human_anatomy_and_physiology_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/heroes_fighting_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0586/0248/files/91140939695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9575/9779/files/joint_of_iid_random_variables.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7589/4437/files/suruninexugorovaxok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/xatokatudorurezilosizor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/28358882007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6119/0559/files/kejagigufuduf.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 3

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_off00004ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE6 5520 bytes
SHA-256: fc2247973cb4341c802c0d12a4602bc676d19e8b484d661c86687146f1edeee5
font_01_sfnt_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 9916 bytes
SHA-256: 0f4b9d3842d931613cf20d71e82d59988fa089f1a47b7b7f6e4e24a666fa0e65

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