Malicious PDF — malware analysis report

Static analysis result for SHA-256 c186acd986197458…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 22:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6cfea935fe0643da527dd8bb80213fae SHA-1: a2406a548f4f0f07a0901ac013a1135d9fc8e40c SHA-256: c186acd98619745820cc6cdd3428f977a26ce7da30e1257109ff2a639c3885c8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'Cambridge book' and 'listening answers', suggesting a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=cambridge+book+1+test+3+listening+answers, which is flagged as a malicious redirector.

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=cambridge+book+1+test+3+listening+answers In PDF document text
    • http://likoje.itmonline-updates.org/uploads/1/3/2/6/132681352/d8fa898f.pdfIn PDF document text
    • http://mamezafi.tristatebiomedical.com/uploads/1/3/1/6/131637016/7ec71f52113ec.pdfIn PDF document text
    • http://bidifokaz.realviewsupplies.com/uploads/1/3/1/6/131607600/1302353.pdfIn PDF document text
    • http://files.harkwell-labels.co.uk/uploads/1/3/1/4/131453674/971fc0c.pdfIn PDF document text
    • http://files.mackenzieosborne.com/uploads/1/3/0/8/130814397/480c0.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/1/0437/3191/0821/files/identify_parts_of_speech_worksheet_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/ligupibepesipumog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/prot_pally_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/vobuzanidokomikas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/jenowadexusivuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/gixuvukibizogir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4966/2117/files/55149049808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/biology_dictionary_english_to_marathi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6974/1983/files/wasekoselonebudo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/resumo_capites_da_areia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5515/3303/files/41594782601.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/52656262314.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 4

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_off000066cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66CB 5560 bytes
SHA-256: 2eb41aa48b1033be934b45619047dbf57a1e36b502177dec8663c39f4fa47c80
font_01_sfnt_off000079ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BA 15524 bytes
SHA-256: e7961c7e17a5c6c2bddbc884de2d1f70273cc6e82c8e66f329963c8dce8b95e4

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