Malicious PDF — malware analysis report

Static analysis result for SHA-256 6810641d118d67f0…

MALICIOUS

PDF

67.4 KB Created: 2020-08-17 09:52:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 52c063a673a377334a9a1b68faf772e5 SHA-1: b239782e4c1d68afeb58c318567a4055c81fbc15 SHA-256: 6810641d118d67f066445f377b8b07c6c701aa33b2b50a9cb2c6d156aab0bd32
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation. The primary malicious URL, https://ttraff.ru/pify?keyword=enterobacteriaceae+identification+pdf, is identified as a redirector. The document body, though heavily obfuscated, contains this URL, suggesting it's the intended destination for the 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=enterobacteriaceae+identification+pdf In PDF document text
    • http://files.viva-musica.co.uk/uploads/1/3/0/7/130739232/5975218.pdfIn PDF document text
    • http://files.jedidiahproperties.com/uploads/1/3/0/7/130776519/e30ff.pdfIn PDF document text
    • http://files.thechhe.com/uploads/1/3/0/9/130969389/2615609.pdfIn PDF document text
    • http://files.annact.com/uploads/1/3/2/6/132695636/1792837.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/1/0433/5733/9816/files/archicad_training_series.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6105/9482/files/86534211752.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/96203091211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7526/3909/files/pevesokirokameken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6949/5710/files/8859909513.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/internationalization_definition_business.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/gem_install_proxy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/xiwozigaka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/66368622255.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/1688/3109/files/passport_application_kenya.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3273/7942/files/cambridge_primary_checkpoint_science_2020.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
🗂 Part of campaign: peachyboho.com 3 samples

Related samples 6

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_off0000cb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB84 5036 bytes
SHA-256: 037117bccb2223a0c4a5b4a0de03f6baa251712b03eaeb208e4e3186bdfd8999
font_01_sfnt_off0000dcac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAC 10540 bytes
SHA-256: a3de94633c0289713e7b9a56d624d7ffb871e38cc61a96180323a584424ad08b

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