Malicious PDF — malware analysis report

Static analysis result for SHA-256 610f79de483a113d…

MALICIOUS

PDF

42.6 KB Created: 2020-08-15 22:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e0bc1749469cd3b53d2b17250f4cdc27 SHA-1: 259291278555e427393da814356a65ded5b4e075 SHA-256: 610f79de483a113d1088961deb43bb89abbe2c3e32ecc830caaf99f516600151
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document functions as a link farm, embedding numerous URLs that point to other PDF files. One of the primary embedded URLs, 'https://ttraff.com/pify?keyword=bear+witness+crossword+answer', is identified as a malicious redirector. The document's structure and the presence of a malicious redirector suggest an attempt to lead users to potentially harmful content, likely for SEO manipulation or to distribute further malware.

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=bear+witness+crossword+answer
    • http://files.tasteofmansfieldct.org/uploads/1/3/1/6/131606674/pojabemadol.pdf
    • http://jawoxu.sandboxbookstore.com/uploads/1/3/1/3/131398455/toneziripegako.pdf
    • http://files.zinkdesigngroup.com/uploads/1/3/1/4/131453998/dafiwiwinis_jawupajolatim_fiwirabeju_xageridop.pdf
    • http://nunowaja.doublefoxx.com/uploads/1/3/1/0/131070450/95963409.pdf
    • http://files.wecanwrite.ca/uploads/1/3/0/7/130775701/sulivujefosusu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/6745/5128/files/garifobirititoralofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/binary_options_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/balanitis_candidisica_recidivante.pdf
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/39869955814.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/horizontal_progress_bar_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5031/files/blank_abc_book_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/wojubawasivuparojupudojid.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/41348672343.pdf
    • https://cdn.shopify.com/s/files/1/0452/6351/9906/files/akuntansi_biaya_buku.pdf
    • https://cdn.shopify.com/s/files/1/0452/7469/3794/files/characterization_of_nanoparticles_by_afm.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6573/files/13202862741.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/75558685162.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_off00006932.bin
8429a8bf57734e1d1faeeaefa0efd8a2066e6a9270d45688b78dc63fb2ff6b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6932 5044 bytes
font_01_sfnt_off00007a6e.bin
2f444db5bf5d7dd21f91d55ceea2e711502fcd5972865c8ee4b023293f1ca11a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6E 10140 bytes

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