Malicious PDF — malware analysis report

Static analysis result for SHA-256 19de43eea2a43fc3…

MALICIOUS

PDF

53.0 KB Created: 2020-08-14 05:34:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8f0cc7691684687af8992eaf028260ba SHA-1: 44ad802688fa21a875edcc4ceeb0c56e7b97e8e7 SHA-256: 19de43eea2a43fc337ffd0a9cac05f733a0a558b1924bf61077a4cf7dd57a809
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=sherlock+holmes+book+series+pdf'. This URL is presented within the document body, disguised as a search result for a book series. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains. The primary malicious URL likely serves to redirect the user to a further malicious destination.

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=sherlock+holmes+book+series+pdf In PDF document text
    • http://files.ldupholsterymaui.com/uploads/1/3/1/0/131069886/9036187a97bae7.pdfIn PDF document text
    • http://palufadek.soleiragreen.com/uploads/1/3/1/4/131437145/gidusopijusagabekav.pdfIn PDF document text
    • http://files.buildingleadersforsuccess.com/uploads/1/3/2/3/132303235/5f92783.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/1/0431/1410/2950/files/77004861914.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2998/7489/files/agenda_2020_objetivos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8625/6030/files/rofutowev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9919/9390/files/segosunosepitebupoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/pemefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9349/0838/files/24324878288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5022/8119/files/67446461918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19252536586.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0027/3830/files/90962659991.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1762/4990/files/bovuvugabepofalovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4040/1566/files/amharic_alphabet_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9066/3832/files/zuxirowe.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 5

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_off000092e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92E2 5492 bytes
SHA-256: 73093c4509ea53e0679a041a251bfc08f381d835f284f56edf5768c9407e4e07
font_01_sfnt_off0000a563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA563 9976 bytes
SHA-256: d328627db24c4f6010a2c286f3f90776d5c7ac24d3111e193c2abcacc819064b

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