Malicious PDF — malware analysis report

Static analysis result for SHA-256 fad2ad59be842a97…

MALICIOUS

PDF

46.1 KB Created: 2020-07-09 10:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 0a65569f5d9f4d4020a66daa856acb51 SHA-1: cd18e8e7929939c32877fd9f878898f2ae254e4c SHA-256: fad2ad59be842a9795bb8efc084e79d365c506865420c4957835754305577662
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure for free worksheets, which is a common social engineering tactic. The presence of a large number of external PDF links further indicates a link farm designed to drive traffic to malicious infrastructure.

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=free+printable+fifth+grade+worksheets In PDF document text
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.pdfIn PDF document text
    • http://files.givshighcaliberbeagles.com/uploads/1/3/1/4/131407965/2621747.pdfIn PDF document text
    • http://files.altaanz.org/uploads/1/3/0/7/130739740/dewafudabota.pdfIn PDF document text
    • http://files.anythinggoescustomcycles.com/uploads/1/3/1/8/131857193/relifefotadob.pdfIn PDF document text
    • http://files.lhsfootball.us/uploads/1/3/1/3/131398540/dezep_kidageren_gopulubarumuj_bamuxajexunimu.pdfIn PDF document text
    • http://files.sbkherbals.com/uploads/1/3/0/8/130814674/tevupufulomajot-viguzipeneged-mutesomagug-mupagik.pdfIn PDF document text
    • http://files.saltwatersurfart.net/uploads/1/3/0/7/130775633/dixivisiriniralov.pdfIn PDF document text
    • http://files.wapentakeleeds.co.uk/uploads/1/3/2/6/132681316/9631786.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://beluxubaw.files.wordpress.com/2020/06/89305182276.pdfIn PDF document text
    • https://xilegit.files.wordpress.com/2020/06/28072830195.pdfIn PDF document text
    • https://netupobupu.files.wordpress.com/2020/07/20285808793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83971047952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.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_off00007524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7524 5344 bytes
SHA-256: ba7f08fb1f35728d9a4a6c1bd2c4b185708423a7efa7a02d44b133dc5f340d07
font_01_sfnt_off0000874a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x874A 10548 bytes
SHA-256: bf596ed23f17fb0e3935bf052d83a526fc075bd64861817ed5f80bfa0b0fa43e

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