Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c386d10f387dd8…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 13:15:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 461622d9c797af9148db202e07349e3a SHA-1: 869ab11ebbbc63d55c2d270c867820ccb8b7fe85 SHA-256: 06c386d10f387dd85b26f68ff39989110b9c28469fb173fb843dca4463d8d1ae
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. The ML classifier also strongly indicated maliciousness.

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=android+auto+2016+mazda+6
    • http://ponal.ritastreasures.net/uploads/1/3/1/4/131406071/wiperixiruta_lifivopega_venuruf_kobixedowupipoj.pdf
    • http://files.shanepsingh.com/uploads/1/3/1/4/131438362/6f015c86.pdf
    • http://files.hopecounselingpetaluma.com/uploads/1/3/1/4/131406202/wifoxubetin.pdf
    • http://xewitil.monamoody.com/uploads/1/3/2/3/132303195/89918.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/63077638008.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5850/files/beginner_english_reading.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/xujokir.pdf
    • https://cdn.shopify.com/s/files/1/0445/5025/8852/files/calendario_nacional_de_vacinao_2020_ministerio_da_saude.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/20453521913.pdf
    • https://cdn.shopify.com/s/files/1/0431/3235/4711/files/sinoxebasasetuzogu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2452/3169/files/37852587487.pdf
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/7093658249.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/97972197697.pdf
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/47348304679.pdf
    • https://cdn.shopify.com/s/files/1/0431/6934/9794/files/tijekezuse.pdf
    • https://cdn.shopify.com/s/files/1/0431/5506/2938/files/79322335123.pdf
    • https://cdn.shopify.com/s/files/1/0433/3993/9994/files/65341472396.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_off000068ed.bin
855035b9c9d0370ce195fca85345324233b7ac72f7ecc84ffd90d5ae22e908ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68ED 5280 bytes
font_01_sfnt_off00007ac9.bin
098d3017e2b10254a507fa609d57b2934b2925072a8ce3330cecc69553cb43be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 13372 bytes

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