Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ded2c6b8f734e5…

MALICIOUS

PDF

41.0 KB Created: 2020-08-19 21:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfd0601dc73fda99b858239c5ac810ee SHA-1: f4200083344c476d12fabd664ed000d83dbcf17f SHA-256: 03ded2c6b8f734e5ec3dbd8a04e61686e18ca1cd9b45e81a5b362936e60a33a6
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. The document body, though heavily obfuscated, appears to contain the same redirector URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly legitimate-looking documents.

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.cc/pify?keyword=coconut+tree+vector+ai+free
    • http://bereti.thedesignco-op.com/uploads/1/3/0/8/130813612/fuxikabozew-nujebuzemifuge.pdf
    • http://duwujiri.nealyibclc.com/uploads/1/3/2/6/132682107/73121f3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0726/2367/files/93157889115.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/business_management_syllabus_ib.pdf
    • https://cdn.shopify.com/s/files/1/0429/2172/2015/files/55817331565.pdf
    • https://cdn.shopify.com/s/files/1/0430/8919/9268/files/29183961947.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/facts_and_opinions_worksheet_grade_4.pdf
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/administrao_de_recursos_humanos_george_bohlander.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/21746711053.pdf
    • https://cdn.shopify.com/s/files/1/0432/3295/2477/files/autonics_tk4s-_14rn_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6936/files/typing_agent_hacks.pdf
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/62686394350.pdf
    • https://cdn.shopify.com/s/files/1/0433/3371/4070/files/jozujedag.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/jifozorirezajapo.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_off00005fba.bin
006ef49eb006e6b4a2c64e756e031f483562ad3dfdff5a766b4f53c7935cadde
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBA 4632 bytes
font_01_sfnt_off00006f88.bin
738f3f20a879fcc14e9c3cac9dd95980566146c9178f193ade7f3c284ce042d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 12900 bytes