Malicious PDF — malware analysis report

Static analysis result for SHA-256 51654ed099cf95b2…

MALICIOUS

PDF

46.1 KB Created: 2020-08-15 13:54:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d2d51cd63a4185a68fdde13f3a39c2fe SHA-1: 6236f467c68b22d7eba7a2a9b5b9c2f0b74f2114 SHA-256: 51654ed099cf95b2fc56c8470f8c940a67d085a03609f11324993ad621cd268c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. This indicates the document's primary purpose is to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The ML classifier strongly supports the malicious verdict.

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/wb?keyword=microcontroller%20types%20and%20applications%20pdf In PDF document text
    • http://files.florinsquare.com/uploads/1/3/0/9/130970022/468fd57b6d458.pdfIn PDF document text
    • http://files.msrozi.com/uploads/1/3/2/7/132710638/6956291.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/1/0437/1503/5290/files/94361511798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6704/0154/files/nozufoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4963/2412/files/70051892591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/classroom_objects_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/zuwaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/bubble_shooter_apk_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/jivuxuralavubazutub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/36772329528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/57976332002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2344/0799/files/viludev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3239/6447/files/96603124096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3162/5882/files/4960450398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5679/9648/files/clinical_pharmacy_and_therapeutics_free_download.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: desertdew.net 9 samples

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_off0000772b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 5256 bytes
SHA-256: 8e1878c8f49ea77d4be58bff150d1b81373e4e5845f1faa7bd47abe8deda7182
font_01_sfnt_off00008921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 10092 bytes
SHA-256: a8d6d7809b07d1a6ad79fe0e471bdafddb87f2da5641c828d818aa271c41ae0e

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