Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da6b6380652eec7…

MALICIOUS

PDF

62.0 KB Created: 2020-08-02 23:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4566fb334a9771d553a27e505fa72dfe SHA-1: 15c49fa475231b4a2c1c503069dd4330baa542e5 SHA-256: 1da6b6380652eec7086584aa342a18919330bc2e4e5f8a510a61d2cd061eb7af
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file exhibits characteristics of a link farm, containing numerous embedded links to external PDF documents. One of these links, 'https://ttraff.com/pify?keyword=python+gaussian+function', is identified as a malicious redirector. The presence of many links, including a malicious one, suggests an attempt to either distribute malware through redirects or engage in SEO manipulation for malicious purposes. The document body itself is heavily obfuscated and contains the malicious URL.

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.com/pify?keyword=python+gaussian+function In PDF document text
    • http://files.oracleministries.org/uploads/1/3/2/6/132681880/gimurafinovel.pdfIn PDF document text
    • http://files.kaingagame.com/uploads/1/3/1/4/131438150/2842893.pdfIn PDF document text
    • http://files.mainlinelawns.com/uploads/1/3/1/6/131606289/9115323.pdfIn PDF document text
    • http://files.brownbarktreeservice.com/uploads/1/3/0/7/130776607/dojiw.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/1/0435/3271/4139/files/48570334311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2440/8991/files/18675671349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/33211768216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3616/4774/files/love_dare_for_parents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5840/5280/files/64919441062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8577/4502/files/61531166597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/essentials_of_genetics_8th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/13449726334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1379/9064/files/99619972678.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6331/2533/files/dawiverapatunefod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6607/8870/files/62669908695.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 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_off0000aff2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFF2 5116 bytes
SHA-256: c8ae5061ad66fafe3d516bbf77c434ad8dc54abe371b7fd53407f09bce4c81d7
font_01_sfnt_off0000c173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC173 13104 bytes
SHA-256: aba77e142e50e105dcb64e41d39b212fd82935f7fdf2bcb28e5c43f0950fba6b

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