Malicious PDF — malware analysis report

Static analysis result for SHA-256 99f4a1047c220b0e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-21 23:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e74fb75e1add1fd2b3f92433386f24c SHA-1: 5919090dea6e6b02f60c9dcd9b739091c641a5e8 SHA-256: 99f4a1047c220b0ec80ca9673b17f202a8eaef0c6adaa159a532fb001fafe8cc
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=atrial+fibrillation+esc+guidelines+2013'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links to other PDF files, including 'https://cdn.shopify.com/s/files/1/0430/9952/1178/files/tirigorovoroxugub.pdf'. The document body contains garbled text but also includes the redirector URL, suggesting a social engineering lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=atrial+fibrillation+esc+guidelines+2013 In PDF document text
    • http://files.newcreationnewton.com/uploads/1/3/2/7/132740838/ruguwilufalek.pdfIn PDF document text
    • http://gipemud.boonennedroughtmasters.com/uploads/1/3/0/7/130739723/juzixosopu.pdfIn PDF document text
    • http://nikeje.brianmonteithart.com/uploads/1/3/1/4/131407370/63aff56ab59192.pdfIn PDF document text
    • http://konogunav.seasprayaustralianlabradoodles.com/uploads/1/3/0/7/130776647/4578132.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/1/0430/9952/1178/files/tirigorovoroxugub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6174/7605/files/42190880930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8135/0820/files/somarapikubanopige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/verbe_etre_et_avoir_present.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6896/4520/files/31486485405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2303/1720/files/wufugot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5725/8401/files/19636081853.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1303/6439/files/katapugifilonox.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 5808 bytes
SHA-256: a5c0c3943905e4c943c38013432636a7354c764c12948b4d9bee4e924a147d2f
font_01_sfnt_off00007676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7676 9836 bytes
SHA-256: 496ac493d60773c137fe5f44553539f6d30241139e39d9f4e782e2a0ae3e9894

Open this report in the interactive analyzer, or submit your own file for analysis.