Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d400690a5afb56…

MALICIOUS

PDF

38.6 KB Created: 2020-07-11 03:03:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4cd04f8baef549885d70f6e55c154501 SHA-1: 94134d5de96c56bb7fc85eca354d5232604d1a49 SHA-256: a3d400690a5afb56191c760d8027d9c01d4e8456da190e6e7dea7fe81934142b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=pert+practice+test+algebra+1+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Pert practice test algebra 1 pdf', suggesting a lure to disguise the malicious link farm.

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=pert+practice+test+algebra+1+pdf In PDF document text
    • http://files.scenealongtheway.com/uploads/1/3/0/7/130775633/vubuwaxazaze.pdfIn PDF document text
    • http://files.ssfitnesstraining.com/uploads/1/3/0/8/130874564/lariraraw_letavapetojewa_safujigefumabe_mamiloge.pdfIn PDF document text
    • http://files.marriedmarks.com/uploads/1/3/2/8/132816158/wawezanuz-titun-resuta-ponupax.pdfIn PDF document text
    • http://files.carlosboix.com/uploads/1/3/0/7/130739311/pujuf_biweda_rikijujat.pdfIn PDF document text
    • http://files.fjsac.org/uploads/1/3/1/6/131606395/lagisaf.pdfIn PDF document text
    • http://files.paintfactory.co.nz/uploads/1/3/1/4/131454304/ee11dd7.pdfIn PDF document text
    • http://files.policetrailer.com/uploads/1/3/1/4/131407010/fotimizon.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bedurezagofu.files.wordpress.com/2020/06/5158966810.pdfIn PDF document text
    • https://fegiduv.files.wordpress.com/2020/06/bapanole.pdfIn PDF document text
    • https://dedovirap.files.wordpress.com/2020/06/42939700263.pdfIn PDF document text
    • https://zezisid.files.wordpress.com/2020/06/zatugafamogajude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1880/5657/files/sudin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/nuxiweluwokovolemowuzajuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/dafofonumexalowid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/70945418412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5243/3557/files/lesefebimusadiku.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_off00005ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AB9 5088 bytes
SHA-256: e503d3e5ca68866a2211de794b687d88a454f2bb056caed8df4d80589626e7aa
font_01_sfnt_off00006c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0D 9820 bytes
SHA-256: 02ae45066b5a9005a0236096df062847993c4442b1958257a031acc2d37aabc3

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