Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f85cd0938c8f87…

MALICIOUS

PDF

51.0 KB Created: 2020-07-27 11:59:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 74b3574cef058694d92edcaec32b104f SHA-1: 5fc5e09cb494b8c878ba1b68bded8fd99b940eb0 SHA-256: 82f85cd0938c8f87f3ee4745f4513156235e613ea61360daae49b9e899e27c3f
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector at 'ttraff.com'. This redirector is likely used to obscure the final malicious destination and is part of a link farm strategy. 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=aparato+reproductor+femenino+y+masculino+pdf In PDF document text
    • http://files.fostercarecoalition.com/uploads/1/3/0/9/130969300/a7a22948ee4b4.pdfIn PDF document text
    • http://files.lewesunleashed.org/uploads/1/3/2/6/132681501/laliku.pdfIn PDF document text
    • http://files.gracecommunitycarshow.com/uploads/1/3/2/6/132681969/boditepazam-vedixanexe-kivaxot-niropu.pdfIn PDF document text
    • http://files.devikafernando.com/uploads/1/3/0/7/130739037/bisototefezi.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/1/0433/0687/7080/files/11147191401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5943/6968/files/sudazarezepux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/mekiwuzikaxedexejajuniso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/51223452111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3436/1503/files/38510897200.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/64326253488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/92783908916.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2252/3288/files/79332496073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/pivolusawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6359/7466/files/xenulekamerugosurevuluro.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 8

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_off00008890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8890 5272 bytes
SHA-256: fef8aa48e695899d8aae50498840fb65b996d07e47c4eaad120cc350a9bbc903
font_01_sfnt_off00009a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A69 11232 bytes
SHA-256: f28aa6ffaa971538a34d83142008e80281ce5aa3021737f9d19e42106d182fb9

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