Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b78ca2b84ca81d2…

MALICIOUS

PDF

43.6 KB Created: 2020-09-17 03:29:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b788960134e34f5efa47f6b2e77d2b0 SHA-1: 6f00ada83d9d91345ba2af25f46d6b9469474fa1 SHA-256: 6b78ca2b84ca81d29b6ff34b5cadd46900336e122ebf7d928b4471cfaeab26e1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links to external PDF files, suggesting a link farm or redirection scheme. One prominent link, 'https://ttraff.link/wix?keyword=sims+mobile+apkpure', is identified as a malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of embedded URLs and the redirection to known malicious infrastructure indicate an attempt to lead the user to a harmful site, likely for further exploitation or malware delivery.

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.link/wix?keyword=sims+mobile+apkpure
    • http://files.londontowalsingham.com/uploads/1/3/0/8/130813428/voxutobupa.pdf
    • http://gixoni.reallifeconsulting.org/uploads/1/3/0/8/130874493/6c532a08.pdf
    • http://files.celebrationrotarypancakerun.com/uploads/1/3/1/4/131408204/jepaluv_lalidova_kanagul.pdf
    • http://files.nnft.ca/uploads/1/3/1/4/131454049/4adba2dd249da4.pdf
    • http://wabefe.nnft.ca/uploads/1/3/1/6/131606666/5119180.pdf
    • http://files.amandathompsonphoto.com/uploads/1/3/0/7/130776449/numedikokaxe.pdf
    • http://files.knowyourbusinessplans.com/uploads/1/3/1/4/131408502/pozilenek.pdf
    • http://files.jvjewelers.com/uploads/1/3/0/8/130814680/4603053.pdf
    • http://files.preschoolinthevillage.org/uploads/1/3/2/7/132712282/zagono.pdf
    • http://files.henryssports.com/uploads/1/3/0/7/130740590/b43d3.pdf
    • http://files.montecitoluxuryrealty.com/uploads/1/3/1/4/131482930/luxabowi_fanepos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/power_play_2_table_hockey.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/49233320410.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/vufex.pdf
    • https://cdn.shopify.com/s/files/1/0438/5354/5632/files/5770706990.pdf
    • https://cdn.shopify.com/s/files/1/0463/1062/1341/files/dictionary_lesson.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_off000068c8.bin
b6f5608a03efdba87b2f23797301e53a14be363073f93d1b0ab4626d5bfb349b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68C8 5272 bytes
font_01_sfnt_off00007a99.bin
5ee12cb336fbf79d3da237dbe10a3466b83f76f76eaf9768c9f98780cb21548c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A99 10956 bytes

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