Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cad7f90453556c2…

MALICIOUS

PDF

43.4 KB Created: 2020-10-25 08:16:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 3b067fe2ad049f4aab12437e8bdcb7b0 SHA-1: cccd3b5ac94860777a292279a8fd1c1965786b88 SHA-256: 6cad7f90453556c286fcacaab4e19a1f9470bd87abaeeb177bc8f1bcc499a6eb
194 Risk Score

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.link/123?keyword=dr+faustus+b+text+pdf In PDF document text
    • https://dazowuxope.weebly.com/uploads/1/3/4/3/134319454/patukofivigo.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/6419222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376609/normal_5f8a97eb62a29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5f8d57f43ddfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376379/normal_5f89dacef2871.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5f88a3efea680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393502/normal_5f9009fc3de61.pdfIn PDF document text
    • https://ninukiwipovesot.weebly.com/uploads/1/3/0/9/130969879/vosetalulebajob.pdfIn PDF document text
    • https://sijevunima.weebly.com/uploads/1/3/1/8/131859613/78f7b7ac897d.pdfIn PDF document text
    • https://kosemarenile.weebly.com/uploads/1/3/4/3/134315061/bdb69.pdfIn PDF document text
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/2bb9ac.pdfIn PDF document text
    • https://kudojazejugir.weebly.com/uploads/1/3/4/3/134322101/titiseganinol.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006b11.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006b11.bin)
    • https://s3.amazonaws.com/zetare/dowiv.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/cordon_umbilical_anatomia.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/fuladilezopurumo.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/labview_scada_example.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/cours_amplificateur_diffrentiel.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/practical_guide_to_hydrogenated_nitrile_butadiene_rubber_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/algebra_all_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/posozidarubuvanetigofel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5907/6510/files/garter_belt_and_stockings.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/android_developer_interview_questions_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7534/6847/files/pattinathar_songs_in_tamil.pdfIn PDF document text
    • http://perseus.mpiwg-berlin.mpg.de/cgi-bin/ptext?doc=Perseus%3Atext%3A1999.03.0011;query=toc;laIn 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 extracted file (font_00_sfnt_off00006b11.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B11 5212 bytes
SHA-256: d6271fa38b9d5bdeb0aaaac3aa78800b653fbc05cde978a02398cb803dcc14cb
font_01_sfnt_off00007cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDD 10320 bytes
SHA-256: 18780f1ba679bbb4dbebb4bfe34765cb20d10d26b295f1d6796003ae347af1f6