Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf698a22100f4abc…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 00:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ac513dd8d7504a256afcdc7d61ac3a2b SHA-1: e5fd4d76226a1858d0c2d140d244420171c9c0d3 SHA-256: cf698a22100f4abc195aa51fbd242f0de1617f4a342f5b8100d7a1f3376ccd23
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. The document body, though partially garbled, contains text related to a free PDF download and a URL that is also flagged as a malicious redirector. The PDF_SEO_LINK_FARM heuristic suggests the document is part of a larger scheme to generate traffic through link farms. The primary malicious IOC is the redirector URL.

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=zend+avesta+espa%25C3%25B1ol+pdf+gratis In PDF document text
    • http://files.monumentblog.com/uploads/1/3/1/3/131381031/ec211d84a.pdfIn PDF document text
    • http://files.jillwilliamsfineart.com/uploads/1/3/0/7/130775970/2073e799.pdfIn PDF document text
    • http://files.koalaremedies.com/uploads/1/3/1/4/131453725/5389291.pdfIn PDF document text
    • http://files.dancingtribescotland.com/uploads/1/3/0/7/130776661/jomakufobiw_kunuvubaf_bafudajitafige_pimexodexiguk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2266/1278/files/34272225177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/repovolipirodexaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9599/0175/files/todenukujajorefimazimegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/43763459508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2853/7753/files/dojegaxupusabomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6413/9674/files/xopuketaluratebowapikaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2909/3800/files/53403104154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/22249021113.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/sorituzozizeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6979/2668/files/gta_5_cheat_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5170/3706/files/22224813736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8292/3676/files/56455754377.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB6 5228 bytes
SHA-256: 08c94c30349a2726cc180fe90b0ae26731abd8850247ede8c19c948783157cca
font_01_sfnt_off00007153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7153 11060 bytes
SHA-256: 1a9fcf682cfedfcdbc48e53ed54e00f29e7d53146950ce7e8f0aeb75730ce34d
font_02_sfnt_off000096ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96AE 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176