Malicious PDF — malware analysis report

Static analysis result for SHA-256 8377f6107b3ce619…

MALICIOUS

PDF

34.7 KB Created: 2020-08-10 09:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d48c080e81e2aa764dc81884ec2c4f29 SHA-1: f9c146a5c068eb067cc79504dae56d019261efe7 SHA-256: 8377f6107b3ce619954e50858a780812546557179fcbcd56fc74e944f3c1f840
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service that is flagged as malicious. The document body, though garbled, includes a URL that appears to be part of a link farm designed to attract search engine traffic for a specific PDF title. This suggests a phishing or scam attempt using SEO manipulation to distribute malicious content.

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=abdullah+saeed+islamic+thought+an+introduction+pdf In PDF document text
    • http://tajuv.drdavidmilanovich.com/uploads/1/3/1/6/131606289/dccfc5.pdfIn PDF document text
    • http://files.localumass.com/uploads/1/3/1/4/131454501/866f14b76dbf5.pdfIn PDF document text
    • http://files.bckmphnz.com/uploads/1/3/0/7/130775025/senuzupupezage_venojux_popolaz.pdfIn PDF document text
    • http://files.blog.millerlab.ca/uploads/1/3/0/9/130969708/7974949.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/1/0431/8999/3636/files/70218405892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/regexenedadonepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/14075742644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/98199265875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/zitesowedemiwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81397135942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0383/8615/files/talking_as_fast_as_i_can_audiobook_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3834/2311/files/seepage_control_in_earth_dams.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/57767848423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/vetod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/luvibuxunefipefijuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/46814137943.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 8

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_off0000482c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482C 5700 bytes
SHA-256: b675b0e320273f218dd6ff7fdcd009c51db2f16427d8d9a3485884f94ec80b3e
font_01_sfnt_off00005b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5D 9488 bytes
SHA-256: fd1d45adfc7dc2a56cadc8f42ed7452bc09d98f8adce174086ce9b3f5894909c

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