Malicious PDF — malware analysis report

Static analysis result for SHA-256 7164773e4ff74d02…

MALICIOUS

PDF

39.0 KB Created: 2020-08-20 14:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6e71f4ca8f6bce4f2073b21d16fb2d51 SHA-1: 9489d302b02e1421ce5b7bc253f14c89e03d481d SHA-256: 7164773e4ff74d0225a2d0ca20aa9ac9fa20938499e8596e23bbc48bc4eec1e4
202 Risk Score

Malware Insights

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

This PDF document contains a lure related to an 'answer key' and embeds numerous links, many of which point to benign Shopify URLs. However, a critical heuristic identified a link to a known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=ncvt+iti+answer+key+2019+4st+semester`. This suggests the document is designed to trick users into clicking the link, leading them to potentially malicious content or further phishing attempts. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ncvt+iti+answer+key+2019+4st+semester In PDF document text
    • http://files.laurenswildliferescue.org/uploads/1/3/1/4/131452872/8957288.pdfIn PDF document text
    • http://files.melissaradtkepiano.com/uploads/1/3/2/7/132712174/9768303.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/1/0432/5939/6254/files/cambodia_visa_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5370/9472/files/54094688677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4704/9623/files/intermediarios_bursatiles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6821/9799/files/lononuzawopebuwibosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/screen_mirroring_samsung_tv_android_tablet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7249/5272/files/java._nio._charset._standardcharsets_jar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7764/5989/files/babijibiwunuxekonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4107/1016/files/17877447672.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/air_compressor_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/15634573009.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6038/7227/files/58999907225.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 3

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_off00005a54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A54 5772 bytes
SHA-256: 0f616b40ce06833eab420879f656f21179301648a28d45a8919d96575a5f6f86
font_01_sfnt_off00006e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E04 9784 bytes
SHA-256: 457edcebd5ee9b0e927e0ba4a0ac308a67e3f6a8cd083374142e3df1bcb919c5

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