Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cae167e11cc8a78…

MALICIOUS

PDF

47.9 KB Created: 2020-08-21 00:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7944c25f71639c9a0dc4189951585d75 SHA-1: cdc44df863b0f78402902132f4ad69d5d6ad0375 SHA-256: 7cae167e11cc8a785ddb53659a7799a9a386347b53e5f3df55f092de29465744
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) identified as malicious. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users with seemingly benign content. The primary malicious URL is https://ttraff.ru/pify?keyword=articles+a+an+the+pdf+worksheet, which is likely used to redirect to further malicious content or phishing pages.

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=articles+a+an+the+pdf+worksheet In PDF document text
    • http://gurexarin.echoltdqc.com/uploads/1/3/2/6/132681670/b3620b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/bevotugitenugawed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2745/6419/files/consecuencias_del_sedentarismo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/28483059787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/bopejatifopovafaveri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7211/9193/files/the_smallest_dragonboy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2222/8379/files/birds_photos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/xiranojafoxor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3105/0915/files/41856565047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mejamuzeditika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0617/3081/files/argala_stotram_marathi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6873 5176 bytes
SHA-256: ab503c2679e34613570ac4bfac1056b49cc3e2c8ef03fe6f89ec09c0153159ee
font_01_sfnt_off00007a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0A 13280 bytes
SHA-256: d8b29a27b0919e0e29cf7e09033710e035d9794d3ca5c0c1b7acec779e23b6e7
font_02_sfnt_off0000a4bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4BF 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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