Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8b64174e6232f3…

MALICIOUS

PDF

37.5 KB Created: 2020-08-21 14:07:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c60f09882b65b86e202ad72fd2566432 SHA-1: 0d4fb78ddff1d906ca172e9a00b044c3114351cd SHA-256: 5d8b64174e6232f3d9c5ef5a5b727c1309a1ddfd13ec5b133032480aa1bc7a53
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector used for SEO-based phishing lures. The document body text, though partially corrupted, includes a phrase related to a "Bsc mark sheet karachi university" and a URL that matches the malicious redirector. The presence of numerous external links, many pointing to Shopify domains but ultimately leading to the malicious redirector, indicates a link farm designed to distribute the malicious payload. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=bsc+mark+sheet+karachi+university In PDF document text
    • http://ronij.loveharmonyrecords.com/uploads/1/3/0/8/130874566/7982092.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/1/0434/1540/4711/files/88737021381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/empty_html_page.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/9142282406.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7244/6873/files/14308699440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7263/2470/files/references_apa_format_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6971/0241/files/cisco_catalyst_3650_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/boboiboy_2_the_movie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1975/4907/files/63773845751.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/word_one_page_landscape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/86726654506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3214/0186/files/15356834717.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: jackpotvapr.com 3 samples

Related samples 1

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_off00005464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5464 5280 bytes
SHA-256: 4748eef607f61c35469bfcfd589863c287e9c080323cfc199eded8a5178ebdaf
font_01_sfnt_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 10368 bytes
SHA-256: 7308bec387ba14c938555c31f45be3ce1d4366ec3d15fe635ac2f902397ebccd

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