Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe827e431d1d6dcc…

MALICIOUS

PDF

43.6 KB Created: 2020-07-31 18:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1813ff1e54760bbc2cedb6509a9e1a9 SHA-1: 64a9b1144a9048196ce38d9af4373e97265fdf1b SHA-256: fe827e431d1d6dcce5be89efcca12afe0a6810d1b45405f39812a6f421dc6625
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel users to further malicious content. The document body and embedded links suggest a lure related to torrent downloads, specifically 'The incredible hulk'. The presence of numerous external PDF links, many hosted on shopify.com, indicates a link farm strategy to distribute the malicious payload or redirect traffic. No scripts were extracted, but the primary attack vector is the malicious URL.

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=the+incredible+hulk+torrents In PDF document text
    • http://files.kinderoopreschool.com/uploads/1/3/0/7/130740586/kajeninu_razuwup_vizudoxod_jejizujopevi.pdfIn PDF document text
    • http://files.bruinsyouthcheer.org/uploads/1/3/0/9/130969944/e59f58f5f1f6.pdfIn PDF document text
    • http://files.vonsmartexercise.com/uploads/1/3/1/4/131453560/2237649.pdfIn PDF document text
    • http://files.yogitreewellbeing.com/uploads/1/3/2/8/132816042/voxiwebujanogomowafu.pdfIn PDF document text
    • http://files.kempstoneastmethodist.org/uploads/1/3/1/3/131379280/pudijedavixuvu.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/1/0428/5428/5479/files/5639628208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5358/0441/files/94760845860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/poluburidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/20078802762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/56826443358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7179/9449/files/36400145767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2175/4787/files/rapogodulolej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/dujilipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5156/4707/files/82183584982.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: kinderoopreschool.com 3 samples

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_off00006b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B9D 4972 bytes
SHA-256: b085985d772b8965a0069bf8d398cb183fd3c92b4058804d44133d3893a6a737
font_01_sfnt_off00007c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C79 10896 bytes
SHA-256: 66399e8d223c8bb021926236c21aba3b307d0c084a62d244ec1fd0617627c863

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