Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd356e818287dd3…

MALICIOUS

PDF

51.3 KB Created: 2020-08-24 18:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd7a4bf7dadddecfe50f7ec28db89f31 SHA-1: 06a5c98563d00269814ccbc4e24915f618416f52 SHA-256: 1dd356e818287dd371e6f13d9ea312ad8fb0d0e1a9a88f879a0a9f5832610ed1
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=beethoven+sonata+5+piano+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, embedding numerous links to other PDFs hosted on platforms like Shopify. The ML classifier strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of the malicious redirector URL and the link farm structure strongly suggest a lure for users to visit malicious sites, potentially for phishing or malware distribution.

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=beethoven+sonata+5+piano+pdf In PDF document text
    • http://files.appleharvest.com/uploads/1/3/0/7/130739779/magixafapuxodake.pdfIn PDF document text
    • http://ripovud.timsguitar.net/uploads/1/3/1/3/131378898/gamus-sedexopusomuzap.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/1/0431/4021/9037/files/70236117248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7023/4527/files/43374625427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0825/1288/files/giludeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/3308/4313/files/befusijilesosowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/kabosota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5834/8700/files/wetogunezikotekizonodaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/89971772153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8406/2622/files/68428252551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3860/5461/files/fuwapasukujelusavopivoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4925/4050/files/masih_ft_arash_ap_goli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0319/9138/files/57449764405.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off00006828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 5236 bytes
SHA-256: 12c8cb102bbd0ef4b106c294962090c8b732adbdbd0d39d206b5a4b8d2b5639f
font_01_sfnt_off00007a01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A01 14976 bytes
SHA-256: ee42216648b196b51ef1ca05cf70b0f851ba75f280afa5924a3aafc6ac8fe88d
font_02_sfnt_off0000a959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA959 16076 bytes
SHA-256: b302cc8f5f09e2795de20733a7353734804733c4090a8051bb0a1a62ee9fdce2

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