Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b4a2d60ae99c4a…

MALICIOUS

PDF

47.5 KB Created: 2020-08-07 05:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9455f7c9355ec1800ba513c3ed555b8a SHA-1: 8baa4358e39e8dd6eb34e57675e014a0e2d5a4f9 SHA-256: 66b4a2d60ae99c4aacd40aa8101e02ec60a7f7b45f573314f69f25b752b89385
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.cc/pify?keyword=digestion+de+las+proteinas+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick users into downloading further malicious content or visiting phishing sites. The ML classifier also strongly indicated maliciousness.

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=digestion+de+las+proteinas+pdf In PDF document text
    • http://jesizet.fpzuc.co/uploads/1/3/0/8/130874218/vinuzimadaja_nasasobej_lonokekin_lomekiwit.pdfIn PDF document text
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdfIn PDF document text
    • http://pikuzas.authorajbell.com/uploads/1/3/0/7/130738799/rowetag_vamazajum_miruwezaji_nenap.pdfIn PDF document text
    • http://rolud.nestingowlstemple.com/uploads/1/3/1/1/131164250/6226288.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/1/0428/0510/0707/files/fixawaxajukudofaxusolajuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9749/6488/files/makalah_arteri_dan_vena_ulcer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2484/0861/files/fuzzy_logic_algorithm.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1785/4373/files/80217963772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/42171150004.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/42175342634.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/91335034857.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7053/8406/files/tezotuwakamajilumavase.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/vepawivozimudatowazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7885/2507/files/vugadepudovusezinu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/23525585563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/18656561736.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_off00007a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 5208 bytes
SHA-256: 1fdf379b453f3cad24be3f9c755e114158aac82fbf1c295bca95283a533ce8f6
font_01_sfnt_off00008bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 10812 bytes
SHA-256: 04e8f50e37a7e09313c15d9c523a73e9b2da6d3d5c33145e79fa01613c0f9d9c

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