Malicious PDF — malware analysis report

Static analysis result for SHA-256 0252e273159bd6b6…

MALICIOUS

PDF

41.6 KB Created: 2020-08-24 10:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: df22ab792267e0408e948f78867ee4c5 SHA-1: 3e2c9bc528f8eb52ec4c47202e38b7261753b104 SHA-256: 0252e273159bd6b6d15620809a9239932058834cde64217153a63a7915e5e277
162 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body and metadata suggest a lure for a free Android browser download, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL is a high-priority indicator.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=avant+browser++for+android+free In PDF document text
    • http://files.summerconferenceportland.org/uploads/1/3/1/4/131453560/956c24d227.pdfIn PDF document text
    • http://files.silverleavesca.org/uploads/1/3/1/8/131871864/pisunipuxi.pdfIn PDF document text
    • http://files.brianabrahamactor.com/uploads/1/3/2/7/132740865/miwutimelafutopexor.pdfIn PDF document text
    • http://files.sdgphoto.net/uploads/1/3/0/7/130739016/81c7c81.pdfIn PDF document text
    • http://files.claudechandlerartist.com/uploads/1/3/2/7/132740399/lixobenal.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/1/0431/5922/4480/files/the_american_pageant_14th_edition_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/jifenapufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8617/6665/files/17878951864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8321/8588/files/articles_on_education_system_in_pakistan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3944/0543/files/ese_veneno_irresistible_alessandra_hazard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3750/8252/files/simple_android_app_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1373/files/kesulitan_belajar_bahasa_inggris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/9854/0949/files/bible_journaling_ideas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3092/0871/files/age_of_war_empires_3_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/803759518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/conditions_of_marriage_in_islam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9829/0856/files/pojigezufutalo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/golang_chat_server.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_off0000642c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642C 5152 bytes
SHA-256: 60b1f53492bb0c95c9048efb77d6d7c20d8a72828dcdb3868afd9aef1348f1cf
font_01_sfnt_off000075d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 10440 bytes
SHA-256: e307181a4e5a363a84a30693836ca0ec33737e7530bf453f42273e7002787c1a

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