Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40c3fc6ef374085…

MALICIOUS

PDF

44.1 KB Created: 2020-08-11 16:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3f1099205159665f6d96962bcc233022 SHA-1: 8f554aa91de259415b2cbd53f1c9ed4c112c553c SHA-256: f40c3fc6ef374085f7eccbb5dd7bedf4eba9ac63c68dc3f90ceb7e418f5cef3e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). This suggests a link farm used for SEO poisoning or to host malicious content. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to trick users into downloading a file or visiting a malicious site under the guise of a technical handbook.

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=ashrae+fundamentals+handbook+pdf+download In PDF document text
    • http://files.chartercommittee.org/uploads/1/3/1/0/131070113/3620550.pdfIn PDF document text
    • http://files.jazzwealth.com/uploads/1/3/0/7/130776037/8635392.pdfIn PDF document text
    • http://files.barnontheweb.com/uploads/1/3/2/3/132303209/c6c900fbf902c31.pdfIn PDF document text
    • http://files.threestorycoffee.com/uploads/1/3/2/6/132681812/dovumizasixexaguj.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/1/0438/0911/2226/files/xewilufituravel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/introduction_to_binary_number_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21659337375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/sagan_bonjour_tristesse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/wozotivoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/61934591704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/welilavuruwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamawogedeveredu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8172/files/48709960068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3273/1038/files/fovunoxevuwabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0464/8859/files/73563272541.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 7

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_off000068a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 5568 bytes
SHA-256: 8760b2ccd3d3df52c34b18c32aef0f89900527091680efc8113510602ae07903
font_01_sfnt_off00007b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B64 13240 bytes
SHA-256: efad124303701e512643b154ac50f581da23503e78235feb1992cb8b4573f8c6

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