Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a5344172af5a44…

MALICIOUS

PDF

45.8 KB Created: 2020-08-19 10:32:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 157d7f7b38c2fdd1c39ed38649e9b72e SHA-1: a73d196b1d9a254fb906592de1949efb5d7f9d34 SHA-256: 60a5344172af5a44d278deabaac9e9ae43d8ac202f917b352dec81b7bae8c29b
174 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting PDF files, suggesting a link farm for SEO manipulation or traffic redirection. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body also contains text impersonating cloud file-sharing services, aligning with the 'SE_CLOUD_DOC_LURE' heuristic. While no scripts were explicitly extracted, the presence of numerous links and the redirection heuristic indicate a malicious intent to lead the user to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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.cc/pify?keyword=file+manager+pro+apkpure
    • http://files.eccai.ca/uploads/1/3/0/8/130814980/7279339.pdf
    • http://files.paracletecc.com/uploads/1/3/1/6/131607943/185eb.pdf
    • http://nuvufiva.estia-agios-nikolaos.org/uploads/1/3/1/4/131437436/4906313.pdf
    • http://files.wrestlingjerusalem.com/uploads/1/3/0/8/130873855/guvazikuvutap-tutuza-rikasezotut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5733/9799/files/lumobovopijakuduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3680/3233/files/apdcl_advertisement_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/capricho_arabe.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/13236605504.pdf
    • https://cdn.shopify.com/s/files/1/0432/5038/5051/files/psicologia_papalia.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2023/files/traditional_vs_alternative_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0458/6419/0105/files/40278266500.pdf
    • https://cdn.shopify.com/s/files/1/0433/5976/4634/files/adobe_id_and_password_crack.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/50345806657.pdf
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/54537404108.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_off000059b6.bin
b6f30ec2a42b87ec0cd9e185e2ca2cfc9bf8f3ee8e265b5b77421ad1d32fcf10		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B6 4980 bytes
font_01_sfnt_off00006a8c.bin
013bd7ccf29134855fa72cdcc99c022c5fd6d00651cd5c97fc3cfb1c0723bd13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8C 10584 bytes
font_02_sfnt_off00008ee5.bin
389cf6b536cbba0f39d540ccb302adaff946807e1ce6f850afc68810da372b14		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE5 18076 bytes

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