Malicious PDF — malware analysis report

Static analysis result for SHA-256 64de2c81c4611cc8…

MALICIOUS

PDF

41.4 KB Created: 2020-08-22 23:27:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b9c2aeef4000ad353fbb284f8eaa03a9 SHA-1: 3477b6227cad52f59f7e13622b12b853507f3ca6 SHA-256: 64de2c81c4611cc82ed04d9de57729f6185714cec6438b765eff327f2aa02ae4
194 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, appears to contain text related to an 'adaptation of animals worksheet grade 4', suggesting a lure to trick users into clicking the malicious links. The ML classifier strongly indicates maliciousness, and the presence of a link farm points to SEO-based phishing tactics.

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=adaptation+of+animals+worksheet+grade+4 In PDF document text
    • http://files.poemsandreflections.com/uploads/1/3/0/7/130775897/valunu_jijinos.pdfIn PDF document text
    • http://suvupaza.arnikafuhrmann.com/uploads/1/3/1/3/131398091/c89384acb6d.pdfIn PDF document text
    • http://jaketafa.hairymosquito.com/uploads/1/3/0/9/130969690/bofoz.pdfIn PDF document text
    • http://files.mrsbrummer.com/uploads/1/3/0/7/130738696/seramokakevuzilo.pdfIn PDF document text
    • http://files.hkisia.org/uploads/1/3/1/3/131398091/neguberovotule-gizaxowow-vanerawix-vukawigezagumak.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/1/0430/7252/0352/files/vavuzagewepiwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/ruxemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/94662163826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/92828639402.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/75469627343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/93249850360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9419/5870/files/altered_carbon_soundtrack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/40350654415.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0835/0615/files/avatar_movie_telugu_dubbed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/43808708395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7806/5059/files/95131827950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/numurininata.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_off00006229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6229 5688 bytes
SHA-256: a9e7ae0dac0a8f614b7e01270b9d60931bc02188ac83c431c95accc3660df2b4
font_01_sfnt_off00007576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7576 10176 bytes
SHA-256: 5021c4cf95539f916e899cd549dd4348d9d7fa5e94770c422320ac3ecffb34e1

Open this report in the interactive analyzer, or submit your own file for analysis.