Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b1725b290d5618…

MALICIOUS

PDF

61.5 KB Created: 2020-08-14 21:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a08fce15fd5df9b3f6785331db714dbc SHA-1: 8c078cf45f76da0e44d93ed94f34f54408681b83 SHA-256: 79b1725b290d5618de696ffebbfa0b52606ed3677fbe1b2b6e27e38c66937f5c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service identified as malicious. The document body, though obfuscated, contains text suggesting it is a worksheet, likely a lure to encourage clicks. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector URL supports a phishing or malware distribution attempt.

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.com/pify?keyword=independent+practice+worksheet+classical%252F+operant+conditioning+answers In PDF document text
    • http://files.xavierlecouturiermusic.com/uploads/1/3/1/4/131406701/ea22f.pdfIn PDF document text
    • http://zopenaj.jkntour.com/uploads/1/3/1/3/131383478/2234875d587.pdfIn PDF document text
    • http://vadinox.farmworkerministry.org/uploads/1/3/1/4/131407440/bebaralilaroxukofij.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/1/0432/0490/3073/files/87108611806.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/muturokotogod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4109/files/tebajuwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0506/7943/files/gojugavibanozibiwoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3709/0211/files/65681850629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/fusofuremabax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5100/7638/files/wudabubumilorudedif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/nys_form_nf-_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9190/9025/files/mhw_torrential_sac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/26113758690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/brick_bonding_patterns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA861 2828 bytes
SHA-256: 4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9
font_01_sfnt_off0000b25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB25C 5464 bytes
SHA-256: 1c363bee3e946836b7c0ac460742976cfb6997a77486e07774b0340e117d6da0
font_02_sfnt_off0000c4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FC 10256 bytes
SHA-256: 1b15e2191da8164ab28d34205e26e8150296b6ddad27f27959552aa1c72bddf9

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