Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ae948a40eb118d1…

MALICIOUS

PDF

52.2 KB Created: 2020-08-30 12:56:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6f5c787ef556c0706f085bac28d75163 SHA-1: 81a77d5c3df6fe1925a5ac2e7c56cc1c9f79617e SHA-256: 0ae948a40eb118d1b71afd9db104fc6a48d3c737cf1ff5b14736bb9f888d5bb1
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning attempt. One of the primary links, 'https://ttraff.com/wix?keyword=taktakishvili+flute+sonata+pdf', is flagged as a known malicious redirector. The document's structure and the presence of numerous links indicate an attempt to direct users to potentially harmful websites, likely for phishing or malware distribution.

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/wix?keyword=taktakishvili+flute+sonata+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_d47b6b01cead40c7a62f0ae2009767b5.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a8fff1eccea478d9856e1cd9f8a6513.pdf
    • https://static.usrfiles.com/ugd/b8c837_942c5375e538440f8284ddcaf11f1afd.pdf
    • https://static.usrfiles.com/ugd/b8c837_5c75d12bd18d45daaf7b6b814430cbda.pdf
    • https://static.usrfiles.com/ugd/565485_d1380069309d42a797d8539f7c88ed01.pdf
    • https://cdn.shopify.com/s/files/1/0437/3122/2682/files/36162093976.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/an_inspector_calls_revision_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/7889/3214/files/aap_ka_aana_dil_dhadkana_status.pdf
    • https://cdn.shopify.com/s/files/1/0441/1644/3288/files/famekizejonaxapalisom.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/windows_7_ultimate_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0459/8684/0743/files/12982934203.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mojedisubeweful.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/90871736094.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/ranogolagepos.pdf
    • https://cdn.shopify.com/s/files/1/0460/1954/3199/files/94576688985.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000076a2.bin
d4e77c6e9d0f0f7430409c99f00e79e539973e768e4ccd2fd2c0ac0ac4be635a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A2 5104 bytes
font_01_sfnt_off00008800.bin
374827c9b849b25b6af824c7db47945dc8e169f5dcdbd7c1fdc6d3ea6379c88c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8800 9956 bytes
font_02_sfnt_off0000aa69.bin
ddc82a3151b15d283764faa3e91d9fa9f3730add8cfed7d5386690928a53f426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA69 17100 bytes

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