Malicious PDF — malware analysis report

Static analysis result for SHA-256 813a7528fc1618ff…

MALICIOUS

PDF

95.0 KB Created: 2020-08-07 14:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7a02c17d5abfa7c7afb8c4972169521f SHA-1: 8eaa0eda69e71061d7864c0015886c718de4abf5 SHA-256: 813a7528fc1618ff0cbbe7252be4e86f10cacff51c038d582367098a149ddebf
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=astrological+calendar+2020+pdf' is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing 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=astrological+calendar+2020+pdf In PDF document text
    • http://files.bearair.com/uploads/1/3/2/6/132695568/megesigusepojames.pdfIn PDF document text
    • http://files.alexmorrisart.com/uploads/1/3/1/4/131453990/107362.pdfIn PDF document text
    • http://filipaja.yourcrystalriver.com/uploads/1/3/1/4/131408970/c47f25939f4ffe9.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/1/0430/1147/3571/files/psychiatric_mental_health_nursing_test_questions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/fikavupetoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1237/4174/files/23215131263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4141/4555/files/fejabakapefukoteb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/the_glass_cage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5286/7477/files/23652377889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5298/9607/files/83803426726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/wubogokujatifofam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/paxugadelopavat.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 5584 bytes
SHA-256: 462fc4b1637ddf661000f8d1b7e5f37452ed0b45ffaa76816eab65bda34bd8ea
font_01_sfnt_off00012965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12965 15204 bytes
SHA-256: d3d0ef92ebc351b06a3c3b7d7254290fc86adacc0d88fb4b2fbd4eb4568380e8
font_02_sfnt_off00015849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15849 16400 bytes
SHA-256: 5b013ab2a817094a01dfe16082dd3913e23fc5b32bc0a1efd26466507c90b548

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