Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e1e44cdddc22e23…

MALICIOUS

PDF

74.7 KB Created: 2020-08-20 05:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aacb283c3bca529fa24253639fd732a SHA-1: 5138915d0682d9a9ac823f8f5e5f5240632ddc24 SHA-256: 0e1e44cdddc22e235665ec602ef3d1cc5834ffdcdfb5bb1fd0a62b463c8cf5c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=kenting+national+park+travel+guide'. Another critical heuristic indicates a PDF link farm, suggesting a tactic to distribute malicious content or SEO manipulation. The ML classifier strongly supports the malicious nature of this PDF.

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.com/pify?keyword=kenting+national+park+travel+guide
    • http://files.bloodsugarbikemagic.com/uploads/1/3/2/8/132814958/6480127.pdf
    • http://files.bomrad.net/uploads/1/3/1/3/131380915/biduz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4357/0343/files/767200208.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/15063238747.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/ano_ang_barayti_ng_wika.pdf
    • https://cdn.shopify.com/s/files/1/0436/9874/9608/files/amazon_aws_certified_developer_associate_exam_questions.pdf
    • https://cdn.shopify.com/s/files/1/0451/2923/6634/files/historia_de_los_caballeros_templarios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6544/2455/files/colt_combat_commander_review.pdf
    • https://cdn.shopify.com/s/files/1/0435/7160/9761/files/71346662366.pdf
    • https://cdn.shopify.com/s/files/1/0433/5963/3559/files/development_economics_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0430/3867/1010/files/drivers_ed_test_answers_florida.pdf
    • https://cdn.shopify.com/s/files/1/0431/0754/9338/files/cetoprofeno_150mg_medley_bula.pdf
    • https://cdn.shopify.com/s/files/1/0437/3420/4567/files/clep_test_spanish_study_guides_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/dymo_labelwriter_330.pdf
    • https://cdn.shopify.com/s/files/1/0435/6544/9371/files/39428357777.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0663/files/vovilezolipigesepixifizok.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000880b.bin
7d7a17b54344d29cf577fd0049a09bc51a25cdaa3969c0321c75a6804eac0c2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x880B 22200 bytes
font_01_sfnt_off0000cd0d.bin
2675ed710837a575adc2de48823400140036eb4f865d2ff9646bb1ef0e67e36e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD0D 5044 bytes
font_02_sfnt_off0000de4a.bin
5b5c7e37c4ee6c3598216334ac140b5372e0014fe71a9025bbbb80c0ba5f1451		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE4A 10708 bytes
font_03_sfnt_off00010330.bin
b29db41b9abf1283e5917ed084e385b1300f15a5043abbe2a8d05d7550163896		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10330 17184 bytes

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