Malicious PDF — malware analysis report

Static analysis result for SHA-256 6605c0bfb7fc91dd…

MALICIOUS

PDF

47.7 KB Created: 2020-08-26 00:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f18f53213d644b8f6f4ae70f8e80571c SHA-1: 57a317c39bb521418e86b747fd3d7fdbc1e6cd3a SHA-256: 6605c0bfb7fc91dd175d0f6c4018a6b5d2c17bc977a75eb0eb3d58f9c483899d
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, including a critical finding for PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL identified is https://ttraff.ru/pify?keyword=the+steeper+an+isoquant+is+%25E2%2580%258B%2528labor+measured+on+the+horizontal+axis%25E2%2580%258B%2529. While no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest a deliberate attempt to redirect users to harmful content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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+steeper+an+isoquant+is+%25E2%2580%258B%2528labor+measured+on+the+horizontal+axis%25E2%2580%258B%2529 In PDF document text
    • http://lijobix.bostonshoestoboots.com/uploads/1/3/1/1/131164250/mexegejo.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/1/0427/9799/0055/files/suwavemekimelarudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3197/5320/files/850723980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2236/0481/files/annotate_windows_10_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/4603/5607/files/brazil_physical_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6581/8789/files/jumewetegidaferubudexo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0577/0904/files/78812100280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/english_to_german_language_book.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 1

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_off0000770f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770F 5692 bytes
SHA-256: 1c36a06f74a97b90586b014a9c640c10457218f1d782936aed83d2ec14e07a49
font_01_sfnt_off00008a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 10580 bytes
SHA-256: 296d4b8e3b3be48eaaeecdefbdc541c6a89643fdf3e7a1f755c8f31aa000ff29

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