Malicious PDF — malware analysis report

Static analysis result for SHA-256 a13ebb763239ec59…

MALICIOUS

PDF

41.5 KB Created: 2020-08-16 12:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67ef2a0c62aeb6907e4c1b0617d719cd SHA-1: 152e8f8db8421f34b705e22114bf2cc4b746f3f3 SHA-256: a13ebb763239ec59d522375c9c22df683b74e2dd603ea80a2ddcccabf7365191
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with at least one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to the malicious URL, suggesting a lure. The presence of a link farm indicates an attempt to distribute malicious content through numerous seemingly benign-looking links.

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.cc/pify?keyword=happy+birthday+mom+song+free In PDF document text
    • http://files.whiskersnwagspet.com/uploads/1/3/1/4/131409526/9838292.pdfIn PDF document text
    • http://risoro.chadceverettart.com/uploads/1/3/2/6/132681670/d68217bee.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/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1666/7814/files/jigirim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9080/files/jusanipapolam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/7708379396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/liregiwobidifoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8164/6758/files/40080377150.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3323/9457/files/rapevomepebotorelatov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2028/8153/files/23619327290.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/85179021412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2753/7828/files/87982557576.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 3

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_off0000641a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641A 5624 bytes
SHA-256: 6ec7fe83f33544505e89a05867f08b7b2ab2f4ece54eef45c83b9266d613ebdd
font_01_sfnt_off00007711.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7711 10052 bytes
SHA-256: 5a1f7a794a84352c2f8c9fb9cf56f444df41cedd76f3b212d31d59ce16198f96

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