Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef9c4bd198614f3f…

MALICIOUS

PDF

47.1 KB Created: 2020-08-23 04:19:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cf33f5bdd7b2816bdcd3afbf015b6bda SHA-1: 21a72ee23df4b2f4ae18ec480359de9da0c9b83d SHA-256: ef9c4bd198614f3f7b27921546e53bebecc0ca50286be9d9d50f0fe46b2b2da4
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 redirector infrastructure. The primary redirector URL is https://ttraff.ru/pify?keyword=calzada+romana+cercedilla+informacion, which is flagged as malicious. The document body is heavily obfuscated and appears to contain a mix of text and binary data, but the presence of numerous links suggests an attempt to lead users to malicious sites, likely 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.ru/pify?keyword=calzada+romana+cercedilla+informacion In PDF document text
    • http://madav.pfoa.com/uploads/1/3/2/6/132680813/kixejuvif_sevoke_sakape.pdfIn PDF document text
    • http://files.artsongsheetmusic.com/uploads/1/3/2/6/132681356/18b7897321.pdfIn PDF document text
    • http://wolive.pigandink.com/uploads/1/3/2/7/132712324/womirekipoxo_vufizuzari_jawewasif_fivetika.pdfIn PDF document text
    • http://files.backyardboyslandscaping.com/uploads/1/3/2/6/132682327/jabifef.pdfIn PDF document text
    • http://files.ibyouth.org.uk/uploads/1/3/0/7/130740323/8efd21538.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/1/0436/3331/1904/files/viwuzeduludinipuzu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/vavizabogexitofepopele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/non_alcoholic_cocktails_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7760/7324/files/56467798647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89462818099.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/58575278243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6143/files/66375929801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4299/5352/files/greater_magic_wand_vanilla.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/kufilip.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_off00007798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7798 4944 bytes
SHA-256: 6b59ed82bcdc83cea3c46a82d828bf86d4880f8e8b4bd973b60c7070a840b9ed
font_01_sfnt_off00008853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8853 11372 bytes
SHA-256: 4a24cf3f1b05165bcff0e31e6559fbc9e8dd00839cbb1179a9041fa66b6db2da

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