Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0f1a973a3f79d1d…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 16:40:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc43ea54df4c8f165b56eb55b1fae167 SHA-1: f56acdb1a3913971375d58e622be0cb0d94a8e30 SHA-256: e0f1a973a3f79d1d291199ead60f369d345ee0aef67ef3855587429eceb56fde
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/pify?keyword=rollercoaster+tycoon+2+guide'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, many hosted on shopify.com, suggesting a link farm or distribution network. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the extensive linking pattern is indicative of a malicious distribution or SEO manipulation scheme.

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=rollercoaster+tycoon+2+guide
    • http://files.artz-rva.com/uploads/1/3/2/7/132740337/3a823353.pdf
    • http://files.freerangecafe.co.uk/uploads/1/3/0/8/130873833/duvinen.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3643/files/83163474341.pdf
    • https://cdn.shopify.com/s/files/1/0434/5580/7654/files/87741103694.pdf
    • https://cdn.shopify.com/s/files/1/0433/5563/5871/files/59387302184.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8710/files/kenosuxokamusulepejo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/72290952875.pdf
    • https://cdn.shopify.com/s/files/1/0431/4424/9499/files/74564061174.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vukabisozudetilo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/aluminium_powder_coating_process.pdf
    • https://cdn.shopify.com/s/files/1/0429/8031/1203/files/arithmetic_and_geometric_progression_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/94957648237.pdf
    • https://cdn.shopify.com/s/files/1/0439/1940/9320/files/becoming_vegan_brenda_davis_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/navagraha_veda_mantras_in_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/buffer_systems_in_the_body.pdf
    • https://cdn.shopify.com/s/files/1/0431/4287/3249/files/garbage_disposal_methods.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ee6.bin
a71584b5fc44339b14c5fa5475320e3b20040d0a6b2e1a943aafdb3709315c33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE6 5348 bytes
font_01_sfnt_off00008124.bin
671b4e00c13d91ba358a431abe5259ce13f88ac1e76528ba59acfbd2b1f43938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8124 10388 bytes

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