Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a3bc1d02aa0b98…

MALICIOUS

PDF

40.1 KB Created: 2020-08-23 04:57:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0881e7436743785d5ad164c412ef8a9 SHA-1: e35dfef5f02d56784e38cd50ef3f1f42af2c5099 SHA-256: 16a3bc1d02aa0b983ebb5c448975e6cdaed0e50225b8ac04ceb3031827ef862d
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malicious content or phish for information. The presence of embedded URLs and the overall structure suggest an attempt to lure users to malicious sites under the guise of an insurance report.

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.ru/pify?keyword=zurich+life+insurance+company+annual+report
    • http://files.highschoolcareercounsellor.ca/uploads/1/3/1/4/131409794/maxuvedibafofin.pdf
    • http://files.amuseartfair.com/uploads/1/3/1/3/131380625/657b2.pdf
    • http://files.ninigretpartners.com/uploads/1/3/1/8/131871433/rodivugaxinizir-belaralonivet-roveripozelu.pdf
    • http://xipovoti.lqblackpool.co.uk/uploads/1/3/1/3/131380349/xemovaxixami_puvitukefe_ramifopoji_fomobamaki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5295/6838/files/82153545570.pdf
    • https://cdn.shopify.com/s/files/1/0437/3233/6792/files/motorcycle_camping_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0440/6539/0757/files/autodesk_3ds_max_2017_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48177964882.pdf
    • https://cdn.shopify.com/s/files/1/0464/5231/0184/files/difonepuxefixita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43106273748.pdf
    • https://cdn.shopify.com/s/files/1/0429/0985/9999/files/jezuwovukabopajopiwepu.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/pl_sql_developer_format_code.pdf
    • https://cdn.shopify.com/s/files/1/0451/2923/6634/files/historia_de_los_caballeros_templarios.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1895/files/safexovuxunizojaxev.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12247178291.pdf
    • https://cdn.shopify.com/s/files/1/0436/5484/0485/files/monawagitiseregupubekuma.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6834/files/36945208782.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_off00006013.bin
d1027055194b9b7700b08451c44a1f2b1fca0499e1a961c8caac307ae8846ddc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 5316 bytes
font_01_sfnt_off00007209.bin
aba604aa111a5a475c50e3b64e4b19701fe368283b4ff4151760b88d0a7f18bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7209 9768 bytes

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