Malicious PDF — malware analysis report

Static analysis result for SHA-256 de692180e1270f25…

MALICIOUS

PDF

38.6 KB Created: 2020-08-07 12:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3b962628f9890a77cf4d1286a07e43f1 SHA-1: 5cc8b34de83a6222e369341c3b93d4f46f188b6f SHA-256: de692180e1270f250b3e1417afe308be40d13a715b94539f94e2fc6ac567e0f3
194 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific redirector URL, indicating a phishing or scam attempt. The primary malicious link is https://ttraff.com/pify?keyword=ielts+general+training+writing+answer+sheet+pdf, which likely leads to further malicious content. The document body, though heavily corrupted, contains references to IELTS and PDF, aligning with the lure. No scripts were extracted, and the file type is PDF, suggesting the attack relies on social engineering via embedded links.

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.com/pify?keyword=ielts+general+training+writing+answer+sheet+pdf In PDF document text
    • http://files.nepaview.com/uploads/1/3/1/1/131163833/4188922.pdfIn PDF document text
    • http://files.lostsoulschicago.com/uploads/1/3/0/7/130740165/nitovozimutas-newizim-venak.pdfIn PDF document text
    • http://files.hava.biz/uploads/1/3/1/4/131437657/bozoruxa_tepifi_jelubowevor.pdfIn PDF document text
    • http://files.thehubwoolavington.co.uk/uploads/1/3/1/4/131406060/vafuwegili-ragamarikamed-sikirudetut-xekuxafibex.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/1/0436/2344/8736/files/25650003409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9602/2933/files/78988531608.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0087/9515/files/what_is_my_ip._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/42946068368.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9800/files/65990262205.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/us_bank_holidays_2019.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2836/4968/files/15163607082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0906/3582/files/15041079111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1305/4357/files/45478986058.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 2

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_off0000587e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x587E 5332 bytes
SHA-256: d4474ca69fc57068a6a9f9e6041ca77359c893b67e3bae8782647cfbdc065b27
font_01_sfnt_off00006aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAF 10280 bytes
SHA-256: b2be6b8f09d76b6a49caa63f2abf72f557ef6f6a060c3fa9389ec66af7f07f59

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