Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec3ece414b258ba…

MALICIOUS

PDF

37.9 KB Created: 2020-08-27 19:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 774478470b314ceda710dc842b05189e SHA-1: c4e969771ad889011f8c84425cdd4d9371b43ea9 SHA-256: 9ec3ece414b258ba2034445e12d9cbd99d70ecfc0c4c829a3e82dd467135f8af
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL and a reference to 'ratios and rates worksheet answer ke', suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=ratios+and+rates+worksheet+answer+ke In PDF document text
    • http://womotida.williamayubforsheriff.com/uploads/1/3/0/9/130969656/6047809.pdfIn PDF document text
    • http://files.beagle-in-mind.org/uploads/1/3/1/3/131398193/lemuribusafip.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/1/0432/1420/9186/files/jifaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/87502501355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9657/0024/files/bacillus_thuringiensis_mode_of_action.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/ancylostoma_duodenale_tratamiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0692/5720/files/nusupirifasolelubobimosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4079/2727/files/driver_scanner_canon_lide_300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/approaches_to_study_of_political_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5951/2223/files/koxukigota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/affidavit_of_residency_form_atlanta_public_schools.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2304/6555/files/91521775960.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/97832161332.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 1

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_off000054aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54AA 5044 bytes
SHA-256: 7d0ae8d819246ebeac16714bc36cd58a78a683bd77b3d734c91e3c2d2aaa99f2
font_01_sfnt_off000065d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 10960 bytes
SHA-256: d7e069967e8e2dc995937d6ec27cb956fbbebb5aa656c8cf920f8b892b893a6f

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