Malicious PDF — malware analysis report

Static analysis result for SHA-256 1720d74e7208b037…

MALICIOUS

PDF

40.0 KB Created: 2020-08-14 05:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6451cb734bc246bc62a1b65c14debd96 SHA-1: ad8b4548dbab7f2002d8ce8cde5be7dc527f62df SHA-256: 1720d74e7208b0377584ffe5cd3f2df1999bf6bbb0892dd7796b6daeab67599c
194 Risk Score

Malware Insights

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

The PDF file contains numerous links to SEO redirectors, including a primary link to 'ttraff.ru' disguised as a free download for 'Income tax rules 1962'. This indicates a phishing or scam attempt to lure users to malicious infrastructure. The ML classifier strongly supports the malicious verdict, and the presence of embedded URLs and a link farm points to a campaign distributing potentially harmful content.

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/wb?keyword=income%20tax%20rules%201962%20pdf%20free%20download In PDF document text
    • http://kakotu.seatonhill.com/uploads/1/3/2/8/132814930/viwewob.pdfIn PDF document text
    • http://files.westyorkshirefurniture.co.uk/uploads/1/3/1/0/131070151/6904612.pdfIn PDF document text
    • http://kuzizolos.restoreyankton.com/uploads/1/3/1/4/131482975/19159440.pdfIn PDF document text
    • http://naroda.globalvisiondata.org/uploads/1/3/1/4/131438729/107be.pdfIn PDF document text
    • http://files.mckinnonactingstudio.com/uploads/1/3/2/6/132695294/1341574.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/1/0428/9835/8432/files/rasebiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0247/8237/files/ispad_2020_dka_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/musirozav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/22258068675.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/xozenobowabazokogepav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/9974826170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/93951768536.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/72736899397.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/47252016137.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2315/5878/files/67234854197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2777/4115/files/biodegradation_ppt.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 4

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_off00005b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 5892 bytes
SHA-256: d27a89639b2ccf23da963d624a547367bfbc5f30d36dde16f0047ae23ea0f698
font_01_sfnt_off00006f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F59 10516 bytes
SHA-256: 2baa25950753125df61d6205163e3c397c059f850760df2ff95d2e3cf5d5ddcc

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