Malicious PDF — malware analysis report

Static analysis result for SHA-256 914aaef3610da04b…

MALICIOUS

PDF

35.3 KB Created: 2020-08-07 09:31:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27797ef4a60f9a884b2030bfd40c437b SHA-1: e92dd662d07084946dce823f9f8a2e07ea564815 SHA-256: 914aaef3610da04b3438c3ef778beda02315c6111e70fd052d624f761372e034
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=cecad.+cuestionario+educativo+cl%25C3%25ADnico+ansiedad+y+depresi%25C3%25B3n+pdf`. This URL is likely part of a phishing or scam campaign, attempting to lure users into clicking through to a malicious site. The document body, though heavily obfuscated, also contains this URL and other URLs hosted on Shopify, suggesting a link farm or content delivery network used to host malicious files. The ML classifier also strongly flagged this PDF as malicious.

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=cecad.+cuestionario+educativo+cl%25C3%25ADnico+ansiedad+y+depresi%25C3%25B3n+pdf In PDF document text
    • http://files.sabahhomestaykualapenyu.com/uploads/1/3/1/3/131381006/dccab9590c8ea.pdfIn PDF document text
    • http://files.itsasign.biz/uploads/1/3/0/7/130775652/rubatuwasodof.pdfIn PDF document text
    • http://bazixirog.spirithorsetrc.org/uploads/1/3/1/8/131856772/podaxuzujo-gamobetep.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/1/0433/3699/0885/files/tutamurexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/88462092781.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokixud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3435/files/96764016595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/gitilimofukuligivene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/35751832584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1547/0245/files/raves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/49283910633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8068/6495/files/adeste_fideles_satb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8906/8185/files/public_speaking_rubrics.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A21 5440 bytes
SHA-256: 3d340ae70626f88161691d1574030cd911234f3d960e7184f71026c27326c841
font_01_sfnt_off00005c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C83 10128 bytes
SHA-256: 134d142a981a43699bd7b79a81b616784e4032abe4a81f87ce7d7baaaa617624

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