Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d844ab04793e7b7…

MALICIOUS

PDF

42.6 KB Created: 2020-08-23 09:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b3f2726cb9d50ae336c11161f29d2a37 SHA-1: c17c09a61be1da8e9a7d306038c9b98a47ef01a4 SHA-256: 3d844ab04793e7b7366b248e61c3360753c9fa0c694cb9383c672f458f3f3c1b
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous external PDF links, many hosted on cdn.shopify.com, suggests a link farm designed to obscure the ultimate destination and potentially evade detection.

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=reforma+luterana+calvinista+e+anglicana+resumo In PDF document text
    • http://files.ncbbq4u.com/uploads/1/3/0/7/130775853/7460552.pdfIn PDF document text
    • http://files.thesecretlifeofmountainlions.org/uploads/1/3/0/7/130739828/surex.pdfIn PDF document text
    • http://jiroxifak.lexingtonservicesolutions.com/uploads/1/3/2/7/132710567/fojaxub.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/1/0432/9901/2763/files/50456777049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0863/0681/files/fate_game_serial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2435/8308/files/bonevanili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0349/3022/files/28367405373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2511/1972/files/82687463898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5948/6626/files/titemumuzimuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6503/files/zibawimuvumejisasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2631/7473/files/22679669280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9018/9215/files/35691045080.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_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 5268 bytes
SHA-256: 7f2c8508e0c134420ac4cf9343b3350ed073a57206ddb34fce58ab7f5275514c
font_01_sfnt_off00007b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B02 9952 bytes
SHA-256: 65f239367487819d9882f4bbb86843e96e7f03d717e038f7d6961377c6237dc6

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