Malicious PDF — malware analysis report

Static analysis result for SHA-256 645e5656486f20d3…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 14:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6779a947de5250c11942786eae3285cd SHA-1: cb5c5dbb1912508010bd79f332ae4798a47df1dc SHA-256: 645e5656486f20d3eef1cfa3d4d2dbc826a473b3f2945574aa8f0ddb490de23d
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body text, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=eu+definition+of+balance+sheet+total, which is a primary indicator of the phishing lure.

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=eu+definition+of+balance+sheet+total In PDF document text
    • http://rilag.steadfastleaders.org/uploads/1/3/2/8/132815806/6310961.pdfIn PDF document text
    • http://files.senkohrs.com/uploads/1/3/1/6/131637047/gimunemuzukaz.pdfIn PDF document text
    • http://files.oliviacliftonbligh.com/uploads/1/3/1/3/131398036/jovanazegi.pdfIn PDF document text
    • http://files.trimaccompanies.com/uploads/1/3/0/7/130776567/9374df6c27134a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/97875319432.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2980/6759/files/merenorukavovobatibakof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4931/2666/files/kezomozixaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/15636630427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/xeforajuziloferamon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0384/5541/files/17518959166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/zunajaraxilafufagok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6327/8758/files/einkommensteuererklrung_2020_anlage_er.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3031/4151/files/64152517912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1433/2309/files/rogonix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/arcanos_maiores_tarot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1593/7948/files/36068160631.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9232/7077/files/connect_echo_to_wifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/gomirabepag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9848/1564/files/74088787212.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6280 5112 bytes
SHA-256: 5a0528d241d322f96094401ae59208363fd512318f7ecbe0f7195205e3df8709
font_01_sfnt_off000073d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73D9 3836 bytes
SHA-256: 1b3745a368c25e461f7fc5c0aca53f743c56e945340b7603ad63ec9d82d48d08
font_02_sfnt_off00008257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8257 11020 bytes
SHA-256: 8a576555fe51c17595ec0cc75e5c1b9b30a3ef8e491138ec6278f23dd4e57c5b