Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a171e9bc2cc4dbc…

MALICIOUS

PDF

49.0 KB Created: 2020-08-23 21:02:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 450df723bf8fdac74ea08b3fa240c99a SHA-1: 4b6381114addf2f7edc85f92fb3611d06f6dea23 SHA-256: 0a171e9bc2cc4dbc1bee40b1a293713fa7ea73fc2965c21ff8b9d7e324b04b83
194 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'Cambridge 1 listening test 2 answer' and embeds multiple links. One primary link, 'https://ttraff.ru/pify?keyword=cambridge+1+listening+test+2+answer', redirects to a known malicious infrastructure. The document also contains a link farm pointing to various PDFs hosted on Shopify, suggesting an attempt to obscure malicious activity or engage in SEO manipulation for phishing. The ML classifier strongly indicates maliciousness.

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=cambridge+1+listening+test+2+answer In PDF document text
    • http://gepej.yogadiversityinitiative.org/uploads/1/3/1/4/131437261/laroli_pezogijavamu.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/1/0428/9835/8432/files/gekisemegudifusoledo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/netbeans_java_gui_builder_tutorial_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/auditing_notes_bcom_3rd_year_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7495/3120/files/41556734652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1081/8201/files/laundry_symbols_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/adobe_reader_for_linux_ubuntu_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/canales_de_distribucion_mercadotecnia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/velatoxixevixubilobamev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/watelajijur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0273/0408/files/zutepexukurameropibafumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1876/9816/files/munilobidiriguwugeduf.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_off00007275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7275 5264 bytes
SHA-256: 1ece4a7f43fb1a0dce93d4cd9fbead803132428f2b471798d4510610fdbebed4
font_01_sfnt_off00008452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8452 10580 bytes
SHA-256: aa4a4380b5ff9ada80e00777ca8fa0328521735d998e0d79cfafc490ca5487c0
font_02_sfnt_off0000a876.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA876 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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