Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1abef52453707d0…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 09:05:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3402046ec7769c9eaf0fecb8d97381a3 SHA-1: d3a18e1a7ca4029835c4ea5f5be026fa7f778cfd SHA-256: f1abef52453707d06897cc3b733949eb8aae193e17d6ee35d69c57eb0a6d7ff5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that are flagged as malicious redirectors. The document body, though heavily obfuscated, contains text that appears to be a lure for educational materials, specifically an answer key. The primary malicious link, https://ttraff.ru/pify?keyword=bridges+in+mathematics+grade+4+home+connections+answer+key+pdf, is designed to redirect users to potentially harmful content. The presence of numerous other links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious payload.

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=bridges+in+mathematics+grade+4+home+connections+answer+key+pdf In PDF document text
    • http://vinox.artvenya.com/uploads/1/3/1/4/131407005/8200414.pdfIn PDF document text
    • http://files.pbjprodj.com/uploads/1/3/0/7/130738971/kigudelilet-kodeb.pdfIn PDF document text
    • http://files.communityconnectionsaz.org/uploads/1/3/1/4/131437333/2360383.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/fexagegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/pozafesusepolur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2435/8298/files/opencv_raspberry_pi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3019/9966/files/92580476077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2797/files/62042492950.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5156/3670/files/dijajizob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/92283418618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/digimon_theme_song_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/nejunedubebuv.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 4

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_off00006532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6532 5720 bytes
SHA-256: 58198bded0c7977c3a0b03287b135e3dcb9e81b396d5ef65fa1d19938002f678
font_01_sfnt_off00007891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7891 10076 bytes
SHA-256: 5e093dafc25dcffa1a3f5042f14e47cdb2207c169627aedd8b814ceaf7f0d714
font_02_sfnt_off00009b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B07 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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