Malicious PDF — malware analysis report

Static analysis result for SHA-256 7724b9ffd39618ed…

MALICIOUS

PDF

37.0 KB Created: 2020-08-20 18:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd5afaf51488ea5ec8ec1c99cafb5289 SHA-1: bfad10a78ce4bb75532266a177e86c29ed1d53cc SHA-256: 7724b9ffd39618ed47d99731dcae7a3ebc637345b29f3aa3b0448237387b163f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one pointing to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to 'free wallpaper' and includes the same malicious URL, suggesting a lure to a malicious site. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful content.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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=free+wallpaper++god+krishna In PDF document text
    • http://files.katschuetz.com/uploads/1/3/0/8/130874359/2380709.pdfIn PDF document text
    • http://mefot.wellpetanimalhospital.com/uploads/1/3/1/8/131857054/6cfc8b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8259/6000/files/hd_wallpapers_1080p_for_mobile_god.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2334/files/lemedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/keluwofuxiraroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6377/0274/files/42053659750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4047/9131/files/riwij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9579/3571/files/aprendizajes_clave_artes_primaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5394/6782/files/35867024048.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6169/8969/files/kuziboraxisiborogub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6310/8003/files/gojulokezagigo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6123/9192/files/rekejumadawus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000472c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x472C 5332 bytes
SHA-256: ae5bb90a2752a8d031311a52248a6de8d8af4c8768bff0e0feaab3c72d4ca7c2
font_01_sfnt_off00005959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5959 9800 bytes
SHA-256: 3538743412e59151c93cc87534a39628e19b7e3aa6e3fdfdb8ea892ba7da1d2f
font_02_sfnt_off00007b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B1A 3092 bytes
SHA-256: 90ff344b673f96cc03a8fddf5956bab86304fb20cca2e0a4b94c98acc95d9880

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