Malicious PDF — malware analysis report

Static analysis result for SHA-256 394cfd1da97349e4…

MALICIOUS

PDF

142.0 KB Created: 2020-08-11 15:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 502ef05e6d74486a04a78a355d6cf64d SHA-1: 9d1ffd804018d5919cbfc5d42b847fb25dcd6b82 SHA-256: 394cfd1da97349e43db7fd3f1438bedc2456a94e2b91ad2179e46a928ebe555c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to a known malicious redirector. The embedded URL, 'https://ttraff.ru/pify?keyword=black+hole+theory+of+relativity+pdf', is the primary indicator of malicious intent. This suggests the document is designed to lure users to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.ru/pify?keyword=black+hole+theory+of+relativity+pdf In PDF document text
    • http://files.giffirdshope.com/uploads/1/3/1/3/131379213/188199.pdfIn PDF document text
    • http://files.totallysocialasd.com/uploads/1/3/1/4/131437806/2989958.pdfIn PDF document text
    • http://files.pacerstalk.net/uploads/1/3/1/4/131452922/jejiz.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/1/0427/7361/0663/files/68221553470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5344/8358/files/brucella_species.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4106/2040/files/agency_problems_and_the_theory_of_the_firm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8454/6209/files/58351421049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/matizapekugewokirojenin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8803/6505/files/27734231678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/43358841448.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/40490950639.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/76118517008.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001daf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DAF8 5340 bytes
SHA-256: 90d2e4044775ffd953dc38f4f0a41127cf57cfefcd30ba23b7682e9336fcc999
font_01_sfnt_off0001ed21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ED21 11624 bytes
SHA-256: 8752580d03fa7241fddde1f188bb92c10fd1ae119555be71a4927dcbca606cfe
font_02_sfnt_off000214b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x214B0 16232 bytes
SHA-256: 1108fde26526beb56470b911c7e3b1f040da0088942da3a1b45fff1576a9b534

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