Malicious PDF — malware analysis report

Static analysis result for SHA-256 252a6d614be3cd8f…

MALICIOUS

PDF

33.2 KB Created: 2020-08-13 22:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 603dc31e2bfb7f5c034c42df457c7a19 SHA-1: 6dd2fd8e05b8ef53c0390501d265004abc06ff3f SHA-256: 252a6d614be3cd8f5fc26bc7c9db04f8ad20ff6bb815273838e5c007750b1b85
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm to improve search engine ranking for malicious content. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which further disguises the ultimate destination. The document body, though heavily obfuscated, contains text related to worksheets and includes the malicious redirector URL, suggesting a lure to trick users into clicking through to potentially harmful sites.

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=heterogeneous+and+homogeneous+worksheet+with+answers In PDF document text
    • http://files.cauchonphoto.com/uploads/1/3/2/7/132710491/4199281.pdfIn PDF document text
    • http://files.theroamingfreelancer.com/uploads/1/3/1/3/131380754/jisoguwu_doromutusoj.pdfIn PDF document text
    • http://files.oceanairandsaltyhair.co.uk/uploads/1/3/0/9/130969889/jotigolopapu.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/1/0430/2936/4899/files/memegurowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0968/files/antas_ng_wika_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2538/3073/files/nimitizomunedixijuxegom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9901/2766/files/chrome_plugin_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/mivifejebakufibaviditix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3039/5552/files/torin_black_jack_2_ton_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/5038244878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/zudubuwoxojopez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/dulon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7101/9935/files/18693948078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6769/3474/files/email_etiquette.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/2373/2636/files/article_370_khand_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dusegu.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 6

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_off000047da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47DA 5324 bytes
SHA-256: e4008098d251ac86f84ba30023fcc09175387b4cd0e8b791201fe8d9c7971177
font_01_sfnt_off000059d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D9 8684 bytes
SHA-256: 3c9b984542a219c4458b679a6a54644c9c20c90d030b39ab463ab544292ffd15

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