Malicious PDF — malware analysis report

Static analysis result for SHA-256 c21f4c3672ad1ce4…

MALICIOUS

PDF

43.3 KB Created: 2020-08-14 08:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 91d4cfa8850c4607e7a2d7dff5c09f98 SHA-1: 88cd87cf9ca37077ef86304daa7003f9587fdb0a SHA-256: c21f4c3672ad1ce43cd55f48fcb1b66b4d1c1293c28753c537b692e5ede431ca
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates a malicious redirector link to 'ttraff.com'. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution. No scripts were extracted from this sample.

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=pure+research+vs+applied+research+pdf In PDF document text
    • http://files.negativetopositivefilms.com/uploads/1/3/2/6/132695701/8278442.pdfIn PDF document text
    • http://files.berniceejames.com/uploads/1/3/0/7/130740571/e3ad010f506a9e.pdfIn PDF document text
    • http://tazule.privatestachebeardoil.com/uploads/1/3/2/7/132740541/3925523.pdfIn PDF document text
    • http://mojepij.emilyisaacswellness.com/uploads/1/3/1/3/131383483/ba47ac8b793.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/1/0440/4881/0149/files/nagipusesufagamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/sovuxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/8750/8135/files/assignment_abroad_times_newspaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7649/9096/files/matplotlib_to.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1802/6142/files/85863408221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5300/files/lol_esports_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1566/6840/files/xaladuxuruvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1345/1430/files/ukulele_worship_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9029/7503/files/pajevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/48989234141.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/bipolar_disorder_articles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4807/4405/files/80609430450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2246/5699/files/68293937464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/deremamelajexixokinu.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
🗂 Part of campaign: loriblaylock.com 6 samples

Related samples 2

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Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 5304 bytes
SHA-256: 8c23271c24b4f80c239583b3a1e9f7752802c767666222de27d8497cb31f0f42
font_01_sfnt_off00007c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C96 10344 bytes
SHA-256: da56f115b75a65cee3649133d9f885b31f17524368b41b39b7c7c3e9b43287ed

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