Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd1a1f142149d23…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 13:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f2191f11aad7d166c815614c22cdc99 SHA-1: 6774137831f743081142d0f900432700da3a2300 SHA-256: dcd1a1f142149d235a6dce22adf67658a3c1d0b2a7fcdb45ea3df33860e95e06
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 a redirector service. The primary malicious URL, https://ttraff.ru/pify?keyword=keep+bluetooth+on+airplane+mode+android, is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to external PDFs, suggesting a link farm or redirection tactic to deliver malicious content. The file was generated using wkhtmltopdf, a tool often used to create PDF documents from web content, which aligns with the redirection strategy.

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=keep+bluetooth+on+airplane+mode+android In PDF document text
    • http://nazefidi.roxylentz.com/uploads/1/3/2/6/132681464/949335.pdfIn PDF document text
    • http://files.cadrc.org/uploads/1/3/1/0/131070051/08f3a.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/1/0432/9907/8304/files/definitive_fracture_care_coding_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3208/3612/files/oster_tssttvca01_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/68007763019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0391/7974/files/biology_science_for_life_with_physiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31688109027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6363/1272/files/dosexekikoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3345/1944/files/insect_larvae_identification_guide_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6808/7711/files/biozone_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5220/3161/files/national_geographic_travel_guide_indonesia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/30685549684.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6665/3858/files/gamutufonix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fokukivovasogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9629/4051/files/31159564566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8108/0725/files/gulitajutofuwub.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 2

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_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 5132 bytes
SHA-256: 79a50b626d654bbbe547ec389a217499253b48d29d791d14de6c6533b37386c0
font_01_sfnt_off0000727a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 10052 bytes
SHA-256: 0a8abc8abf3fe1e2c3395d55d04fad922371992242056fb731c8bb14915a924e

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