Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a66bb4d0bef550…

MALICIOUS

PDF

44.5 KB Created: 2020-08-14 16:50:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4063a8e84151fd1d6f4b39807c985db4 SHA-1: 26249b4738c39c8008f7e49005e842ffd452d9f8 SHA-256: 67a66bb4d0bef550c5d93235d414ea714632411c50afbb0ed0ce91354ff55cca
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 pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of a link farm and ML detection further supports malicious intent, likely to redirect users to phishing sites or download 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=sharepoint+2013+discussion+board+unanswered+questions
    • http://files.katlynsampsonphotography.com/uploads/1/3/1/4/131437832/xilub.pdf
    • http://files.westburybondreferendum.org/uploads/1/3/1/4/131454355/2977560.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/8590/3510/files/ludiniwapevito.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/mavudifajorazowax.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/gemeliworawelizub.pdf
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/50298815590.pdf
    • https://cdn.shopify.com/s/files/1/0454/7146/5624/files/voxuxixigejosojal.pdf
    • https://cdn.shopify.com/s/files/1/0439/4608/2472/files/metodo_biopsicosocial.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/edema_agudo_pulmonar_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0430/3077/3913/files/97451973728.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/canon_eos_rebel_g_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/34686879859.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_off00005fe1.bin
cdc8aaa7c5106a56ac2fef06aaf9ffe7953724ec4ae62889b47f8c23a9dac0fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE1 6080 bytes
font_01_sfnt_off00007484.bin
bcc52c2803d40f2a2d4d9b18149504bed57891e05f5df953a9b7479d74475b67
pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 15516 bytes