Malicious PDF — malware analysis report

Static analysis result for SHA-256 66316eba832d5342…

MALICIOUS

PDF

45.6 KB Created: 2020-07-28 06:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 39bd7c5d0752f7d338c16ae31a224057 SHA-1: a7b39fcda856f57d8452dd6b8eee5abc1816584d SHA-256: 66316eba832d5342f6e43bd3f296ac54034a670528401d3bd16381f292e70b8a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains a large number of embedded links, many of which point to a redirector URL (https://ttraff.ru/pify?keyword=double+and+half+angle+identities+worksheet+answers). The document's content is presented as a worksheet with answers, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the presence of malicious redirector links and a link farm designed to appear as legitimate 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=double+and+half+angle+identities+worksheet+answers In PDF document text
    • http://files.lionessprayer.com/uploads/1/3/1/3/131398347/3233586.pdfIn PDF document text
    • http://files.futurefitness4allofyou.com/uploads/1/3/0/7/130775592/duragozunilisu_navaxigifigisep_kodalo_kejonetevotapo.pdfIn PDF document text
    • http://files.usfncnw.org/uploads/1/3/0/9/130969080/pakukogemijumuvoz.pdfIn PDF document text
    • http://files.greyriderfordixiecom.com/uploads/1/3/0/7/130738752/zekuwuvotopu.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/1/0428/9835/8432/files/tiwimuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0489/5143/files/nivodatav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9350/5688/files/92464879635.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1673/3340/files/kafixezedasujudex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9038/5823/files/97023021569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7182/2229/files/jasurojefezupejon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/rukojebutitutuvavezofaxud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2591/4262/files/tukonepuligo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0342/0570/files/6592138536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/27560823297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9744/6818/files/vorelitudiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7701/files/marudof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/satofekefekuwozavobijogut.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 5348 bytes
SHA-256: cfd498930ba8df958d64f70b9aff26abcabbfce514a755134c8f7cc51eb11b1f
font_01_sfnt_off000084f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 10532 bytes
SHA-256: acab499e6ed0e1e92cf7bae0a4d6f5762dbe32e85700669cd6ec370e93a4811e

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