Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad4289a7a4bf6dd…

MALICIOUS

PDF

40.1 KB Created: 2020-08-12 12:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5662207749a0fc590a4c16aea6a0cc53 SHA-1: a5c8728fa6f109e1147aad69b8d4128a539bf4e7 SHA-256: 7ad4289a7a4bf6dd91c2d45f1eae39e3695873f2e401266abd1f63c8959c3c48
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and appears to be a lure for free downloads, likely a phishing or scam attempt. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links further supports a malicious intent to drive traffic to potentially harmful sites.

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.ru/pify?keyword=surgical+anatomy+of+the+heart+pdf In PDF document text
    • http://files.gutfreundcornettart.com/uploads/1/3/1/4/131454699/8444265.pdfIn PDF document text
    • http://files.stuphotoart.com/uploads/1/3/2/6/132682655/7254959.pdfIn PDF document text
    • http://files.brothersinthewild.com/uploads/1/3/0/8/130814900/1239264.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/1/0430/1701/1353/files/comment_crer_une_page_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/gizomapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9072/2472/files/niloxifuralujuxufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/voa_e5_8d_ab_e8_a7_86.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/97358357511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8070/3382/files/xilowuxaxevul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/39432737524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/wadezinat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5365/2895/files/water_supply_and_sanitary_engineering_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/94029050098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/nanijumiba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/cadences_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8930/files/gofemijokez.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 8

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_off00005ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECB 5596 bytes
SHA-256: 959b3b789b0e05000c966f93b8f1b471114e4442f559062dbaf9c117fd7a62d9
font_01_sfnt_off000071a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A9 9952 bytes
SHA-256: b4d1e50b508f411b6c4d3fc904580ffc09c2bdfc4a2baa18a7ec7e5b3a09aee8

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