Malicious PDF — malware analysis report

Static analysis result for SHA-256 1deca0c18fba00ec…

MALICIOUS

PDF

46.7 KB Created: 2020-08-18 15:54:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff4a23ba050ade19c5b022b5af7df597 SHA-1: 22779296dcf1c6dd599320b288ec376c3ef9341b SHA-256: 1deca0c18fba00ec4656d999667f9b9cee5756c952c78004e2abf868168d8f2f
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 external resources, indicating a link farm. One of the primary links, https://ttraff.ru/pify?keyword=ielts+writing+task+2+types+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to the topic 'Ielts writing task 2 types pdf', suggesting a lure to attract users to click on the malicious link. No scripts were extracted from this sample.

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.ru/pify?keyword=ielts+writing+task+2+types+pdf In PDF document text
    • http://files.saintlukebv.org/uploads/1/3/1/6/131606491/kobaxisoteporaxexego.pdfIn PDF document text
    • http://files.tewkesburybbc.co.uk/uploads/1/3/1/4/131406535/1093196.pdfIn PDF document text
    • http://files.sirius-nutrition.com/uploads/1/3/1/6/131637306/zojufimezo.pdfIn PDF document text
    • http://files.nellasquestinc.org/uploads/1/3/0/7/130776230/zupimomek.pdfIn PDF document text
    • http://files.halloween5k.co.uk/uploads/1/3/2/7/132740502/092ea325.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/1/0428/9835/8432/files/tovovowegafakaroseras.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3092/1895/files/28367226882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/46465231585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4965/files/27599049487.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/574869212.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6646/6216/files/92996687713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2402/2677/files/9116937178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/3662583209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/funny_university_names.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5802/6904/files/62031516431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7134/files/fipuzupaxixipumisiwowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5857/7064/files/42699181910.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 3

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_off000077aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77AA 5536 bytes
SHA-256: bce52ea7c798425f1ba8750f1bf38a3c8317ca9e1bb97473cc92837da4ecfcbe
font_01_sfnt_off00008ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 10460 bytes
SHA-256: db0e5a85a960b83dc4c41cbcb5d116b15bc7fe4cfc76fa08260e4e21839492a6

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