Malicious PDF — malware analysis report

Static analysis result for SHA-256 665c5ece1c19a9c5…

MALICIOUS

PDF

48.1 KB Created: 2020-08-03 14:06:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4f6d12e1fba1f8432e1ba1a3450fb099 SHA-1: 2c25dd6224dab7d7f85cb398949e360ac90efcb5 SHA-256: 665c5ece1c19a9c5a39ebc27e5c5ba045fc22415d2fcd6aa44f04ac50f4e6a31
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as legitimate resources, but the primary redirector URL `https://ttraff.cc/wb?keyword=conjunction%20exercise%20for%20class%207%20pdf` is flagged as malicious. This indicates a phishing or malware distribution attempt using SEO tactics to attract victims. The document body, though heavily obfuscated, also contains this malicious 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.cc/wb?keyword=conjunction%20exercise%20for%20class%207%20pdf In PDF document text
    • http://lotigi.lakelouisebiblestudy.com/uploads/1/3/2/8/132815002/xorumodod.pdfIn PDF document text
    • http://files.straitstravellers.com/uploads/1/3/0/8/130873822/cb380b9619235.pdfIn PDF document text
    • http://files.wellsteadshrubs.com/uploads/1/3/1/3/131381046/wozobadilozopaz_nujejegerizus_tafibelub_zadanefadupe.pdfIn PDF document text
    • http://files.schec.net/uploads/1/3/1/8/131871894/6851944.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/1/0434/1828/8285/files/56954465039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/88097839597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7329/7822/files/kutesosanovigororizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6857/1296/files/59667165005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/2731598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zenafepejeviwasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9521/1680/files/velitegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5462/0059/files/81429084166.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7054/6335/files/mexuwavigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0103/files/vituxutipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/31650157213.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 8

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_off00007e46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E46 5280 bytes
SHA-256: e006e35d50ba1602f43451bdf05e2b902f4bc989f24b0b75fb547c730fc22844
font_01_sfnt_off00009059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9059 10120 bytes
SHA-256: 7004c04c69dd85845908970c2abf077746205b982d79d287ecf0fd5e9bbd205e

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