Malicious PDF — malware analysis report

Static analysis result for SHA-256 7362eade1f1c8edd…

MALICIOUS

PDF

49.9 KB Created: 2020-08-16 12:29:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d6ae889fe6f573ba953fb84f905fc6b SHA-1: 19ae266dce7c4d03117703c7b0cc3a644a5bbbbc SHA-256: 7362eade1f1c8edda50be052e1d190796a30bec655bab9eec43a885808486fc2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.cc/pify?keyword=sara+ataxia+outcome+measure+pdf, which likely leads to further malicious content. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute malicious content. No scripts were extracted, but the document's structure and embedded URLs indicate a redirection-based attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=sara+ataxia+outcome+measure+pdf
    • http://files.grandbendsoccer.ca/uploads/1/3/1/6/131606984/d0eb950c25ac46.pdf
    • http://files.azheatblog.com/uploads/1/3/1/4/131452815/5119104.pdf
    • http://files.renaissancefarmburlington.com/uploads/1/3/2/7/132741556/5349442.pdf
    • http://files.gen2revcatholic.com/uploads/1/3/2/6/132681743/virunijokevenur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/62936144056.pdf
    • https://cdn.shopify.com/s/files/1/0433/9430/2117/files/diwifiwafomobiz.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/calendar_ortodox_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0206/8131/files/causas_antropogenicas_del_cambio_climatico.pdf
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/south_carolina_dmv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/bloodborne_fist_of_gratia.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/11296210697.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/xijigozefotidivowixalelu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/bring_it_on_home_to_me_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/2634/1272/files/33202053313.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/10434602152.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a3c.bin
54a72399c2fb5001583e2e18c07c3028bb16819d698122447dbbdfc80af095e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A3C 5440 bytes
font_01_sfnt_off00008ca4.bin
126ab6e58c268866b0589a8d54d78ff26d0d869a082ab85ded7d55f93eb09588		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA4 14908 bytes

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