Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3a1b3ca90f5a6e…

MALICIOUS

PDF

51.3 KB Created: 2020-08-17 05:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7e8aafa157e89be940ac78cafe40a064 SHA-1: be31f6b876b69b2e65d8d4e07f985a4e163e56ed SHA-256: ff3a1b3ca90f5a6e8c30dbd97dc764864d3279f5dbe0528d0dc16079350f6044
194 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, contains text related to 'cardiac tamponade pdf' and references the wkhtmltopdf tool, suggesting a lure document. The presence of multiple Shopify-hosted PDF links indicates a potential link farm for SEO poisoning or to obscure the ultimate destination. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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.cc/pify?keyword=cardiac+tamponade+pdf In PDF document text
    • http://files.mountainshadowfarm.ca/uploads/1/3/0/7/130738720/6843000.pdfIn PDF document text
    • http://zediraki.mrmowerdirect.com/uploads/1/3/1/4/131482975/sajajalutarozoloze.pdfIn PDF document text
    • http://pumute.cairngormsnaturalburials.co.uk/uploads/1/3/1/8/131857054/velolujegura.pdfIn PDF document text
    • http://files.marianchoraltuam.com/uploads/1/3/1/0/131070561/4436642.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/1/0437/2611/0888/files/vasilipexevokulizuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/37671972124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6510/4791/files/vatukowakiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/nibekug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1895/2612/files/fepakadenak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/36791534610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/wi_fi_sync_iphone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7695/1965/files/13104228170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8187/8942/files/bixi_map_montreal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/42393686224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7041/3207/files/fulakalekejozijodujiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6503/3383/files/kusanevasulupizowor.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 4

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_off00008bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC5 4996 bytes
SHA-256: cb89da043e723bc89a584b39e4d46f917bae616510b013bb41e03b6b2c76a69d
font_01_sfnt_off00009cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CB2 10576 bytes
SHA-256: 52d5a5678fce5f09587c7eafa36d6249e00091146e2fec82c539472fed9dc52f

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