Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc16aea683d5014…

MALICIOUS

PDF

34.8 KB Created: 2020-08-23 05:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c82fbef2f326043def29ec81b0befc9d SHA-1: e4c6c1607d3b21350f5fb140b95d4df12d476114 SHA-256: ecc16aea683d5014655117f2e5fa9b6ab6f864500e6a100a329adcd3be3983cf
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=the+history+book+dk+pdf+free', points to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is largely unreadable binary data, but the presence of the malicious redirector URL and the link farm structure suggest an attempt to lure users to malicious sites or distribute further malware.

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=the+history+book+dk+pdf+free In PDF document text
    • http://lebasi.holacarolina.com/uploads/1/3/0/7/130775521/2238596.pdfIn PDF document text
    • http://files.tritttechnologylab.org/uploads/1/3/2/6/132696233/favax_zogolokumavipi.pdfIn PDF document text
    • http://files.eleanorroseoutdoorquiltshow.com/uploads/1/3/1/3/131381677/e64d202ce37.pdfIn PDF document text
    • http://files.djpaulgoodyear.com/uploads/1/3/1/0/131070051/2463749.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/1/0427/8019/7031/files/kajobalifub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/xaxigevivafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6221/5324/files/78387551856.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8951/files/basic_english_vocabulary_with_pictures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/5615/4020/files/vuloginupuxoze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/imp_catcher_osrs_quest_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/75625799850.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_off00004bbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BBF 5140 bytes
SHA-256: 7f990b7b353952a4a6707aa596070eb535444b4f72899fa3378270eea45cd92c
font_01_sfnt_off00005d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D37 9844 bytes
SHA-256: c976978235ab77f31ec08d62fa7a6a5f529bffdcb226a89f378930db4a14edaa

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