Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d996f70acb1a67a…

MALICIOUS

PDF

37.0 KB Created: 2020-08-10 02:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0cf00fee718406067f12e97cf62ca501 SHA-1: 699b5d539ec134117205b789624047cae53981e8 SHA-256: 1d996f70acb1a67a2e6752801fcc7f403ff9a5974ffd460a9edc4cbd543bc93e
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to lure users into clicking on what appears to be a calligraphy workbook. The primary link, 'https://ttraff.ru/pify?keyword=copperplate+calligraphy+workbook+pdf', redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly flagged this PDF as malicious.

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=copperplate+calligraphy+workbook+pdf In PDF document text
    • http://files.unfilteredperspectives.com/uploads/1/3/1/8/131856498/mijirakik-vebudojedo.pdfIn PDF document text
    • http://files.thebeamtravel.com/uploads/1/3/1/4/131454012/3152886.pdfIn PDF document text
    • http://files.followingcortney.com/uploads/1/3/1/4/131437299/gipet.pdfIn PDF document text
    • http://kowifo.beachfronthl.com/uploads/1/3/1/0/131070718/73025a7d5.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/1/0429/8833/9354/files/vijunax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4646/1852/files/suvitogoka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/zemojopuzumukusitotabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/adobe_reader_for_android_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/dipikasawinitipuza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0880/2466/files/10720843795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0971/2021/files/zogexupigibeginut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41718344304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lawup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/fomipexozisuzuzokazanuxev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.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 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_off00004fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD5 5544 bytes
SHA-256: 388e5901c032bf0ed4a31507e2b46ba55883f31b0b69d9d810af35b0ed1ff40f
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 10712 bytes
SHA-256: be7ec27f901091b40f2d392cf47b4cbc308976c567c7d1e12b05e9e18984cbce

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