Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df783a7ac26edfb…

MALICIOUS

PDF

39.4 KB Created: 2020-08-22 19:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f0d7cf396393e726ce3b724f3326bc5c SHA-1: d889d70dd0215f7c8cdf48b252ab53e8d9bb215b SHA-256: 0df783a7ac26edfb2c91313750addf632e931edb11df4f1a7b99698a56b47aa1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The primary redirector URL is https://ttraff.ru/pify?keyword=2017+ashrae+handbook+fundamentals+si.+pdf, which is used in an attempt to trick users into downloading what appears to be a legitimate document. The ML classifier also strongly indicated maliciousness.

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=2017+ashrae+handbook+fundamentals+si.+pdf In PDF document text
    • http://ruxaw.clayimpressionspottery.com/uploads/1/3/1/4/131437987/dizizefavivemifavu.pdfIn PDF document text
    • http://files.angiezinserphotography.com/uploads/1/3/2/7/132740804/a9c2341b.pdfIn PDF document text
    • http://files.capefalconkayaks.com/uploads/1/3/1/3/131379223/2717859.pdfIn PDF document text
    • http://demokato.ithappensthebook.com/uploads/1/3/2/6/132681459/vofozovok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7804/8161/files/kikuwiguvikafedopulena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/bd_cytometer_setup_and_tracking_application_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6300/0736/files/72258159827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/aerial_lift_osha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3090/files/disexewut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/6470/7483/files/mariadb_for_windows_8._1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8600/2843/files/68146384419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0443/3308/files/8666406790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/7702/6201/files/chimera_tool_drivers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7219/1641/files/medomojisupekal.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 7

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_off00004ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA6 5712 bytes
SHA-256: a362a534407a59d2b12823af5e7aed647dc69ffca86d3250e7fcb245d77b0f0d
font_01_sfnt_off00005fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD7 10108 bytes
SHA-256: 4accd3b44c64b11a0b5e9e5734409048fab35e01435b163a1069bbbd92f27c52
font_02_sfnt_off00008283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8283 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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