Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a826bb2c464b141…

MALICIOUS

PDF

48.9 KB Created: 2020-08-25 14:56:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81ae424db40f70d437cc235aebab9e46 SHA-1: e66ee67d7d5d058c0123e0d2406fbeec06efa56c SHA-256: 8a826bb2c464b141825e19f01b827ea174e562657d592915049a685f37f9b66a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=infarctus+du+myocarde+cat+pdf'. This URL is likely used to redirect the user to a malicious site. Another heuristic indicates a PDF link farm, suggesting a common spamming technique. The document body, though heavily obfuscated, contains the same redirector URL, reinforcing its malicious intent.

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=infarctus+du+myocarde+cat+pdf In PDF document text
    • http://files.lakesidehighschoolavid.com/uploads/1/3/1/8/131856257/244680.pdfIn PDF document text
    • http://fidijat.beechwoodlanding.com/uploads/1/3/1/4/131406437/6ea7c.pdfIn PDF document text
    • http://files.wisewomanliving.net/uploads/1/3/0/7/130738792/lavopu.pdfIn PDF document text
    • http://dilubam.robbywjohnson.com/uploads/1/3/0/7/130775413/muzegazekagoxolom.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/1/0434/1979/5623/files/types_of_archaeological_sources.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0010/3073/files/82091550170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7716/3426/files/carnivore_herbivore_omnivore_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0602/4090/files/69948714982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/56593761248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/ripoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97697777452.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5158/1597/files/46614236951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/class_12th_time_table_2020_up_board_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mojarugalemidim.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 5

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_off0000813c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x813C 5308 bytes
SHA-256: d6ae69062c470c292d298ff7708d138358c6b5e0e7371831809c2ab66cad18aa
font_01_sfnt_off00009331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9331 10480 bytes
SHA-256: 590eec57770c6bfc47b263f8b88d087240114a98c7a6002fce7751c77b969df4

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