Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9db0206bf5ed4…

MALICIOUS

PDF

46.2 KB Created: 2020-08-11 20:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b658829106192ac25d794ea058092c35 SHA-1: aeedd933d07074cc1cca7b3b470f61dc01349a60 SHA-256: 0ee9db0206bf5ed44ac912787da918b4e37ced6ba05833cb7879a0867224a0e6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arsenic+and+old+lace+book+pdf', which is likely intended to lead the user to malicious content. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic.

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=arsenic+and+old+lace+book+pdf
    • http://files.bishopgumbleton.com/uploads/1/3/1/3/131379371/tokasinipegog.pdf
    • http://rojubirej.aastem.com/uploads/1/3/2/7/132741144/9614103.pdf
    • http://files.3wheeldriveonline.co.uk/uploads/1/3/2/6/132682335/c6a22e022e938.pdf
    • http://files.frontierguardians.com/uploads/1/3/2/7/132712096/6f7435947d0208.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/nukewotevisapononag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76640573288.pdf
    • https://cdn.shopify.com/s/files/1/0448/4608/8349/files/list_of_adjectives_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0437/0812/1242/files/rovonigomewuwogame.pdf
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/78300695046.pdf
    • https://cdn.shopify.com/s/files/1/0429/0835/2679/files/satozogotejekanifopitov.pdf
    • https://cdn.shopify.com/s/files/1/0437/6500/6494/files/carburetor_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0433/1523/2923/files/63003531965.pdf
    • https://cdn.shopify.com/s/files/1/0435/5378/3967/files/active_and_passive_sentences_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/capping_machine.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_off000075a9.bin
1b0994fe09dce09a80f963c9de7bd872faf8aa5c6d50a40a81236b13034f8abf
pdf-font-stream PDF embedded font (sfnt) at offset 0x75A9 5344 bytes
font_01_sfnt_off000087d1.bin
7781a0ffc60c956f9415a25106d146b86504110d38d840926f339920ec1ec19f
pdf-font-stream PDF embedded font (sfnt) at offset 0x87D1 10536 bytes