Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e64b01a7324c5d4…

MALICIOUS

PDF

45.1 KB Created: 2020-08-13 22:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f7ea192dcf7bca0f9cfabfb60dcd9b6 SHA-1: 5fe2b50c283f92f6c1e0629522b3951ca00c35de SHA-256: 7e64b01a7324c5d4c8b5afc7bb21da5c9367da7cd1c54445556f85ab73adc492
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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=date+format+in+report+builder
    • http://kesipe.bhambassclub.org/uploads/1/3/0/8/130874284/xomesubewof-rululefeve-fofewoxaz-vazufetigapekoj.pdf
    • http://files.helpsaveourhistory.com/uploads/1/3/1/4/131437091/rikebajafok-dokumudezani-fusex.pdf
    • http://files.feliciasmusicstudio.com/uploads/1/3/1/4/131455463/gukewipose.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2468/4955/files/elements_of_statistical_learning_data_mining_inference_and_prediction.pdf
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/kotiwase.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/bidubolumesapixeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/gijejukotezubimikunolinu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/dell_optiplex_7010_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/98166163992.pdf
    • https://cdn.shopify.com/s/files/1/0440/1351/9006/files/86291824859.pdf
    • https://cdn.shopify.com/s/files/1/0434/7186/3961/files/programa_para_convertir_de_a_word_love.pdf
    • https://cdn.shopify.com/s/files/1/0439/3389/2763/files/mivumobulusazijetegivo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/dixewuzijisopusivobape.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/25540652794.pdf
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/kagoberisijoju.pdf
    • https://cdn.shopify.com/s/files/1/0432/0133/1360/files/67484181753.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_off00006840.bin
b7c8c5aef8952eacbfd959430e08b1cafb3443e19a5cb1141f473d33b660c1b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6840 5148 bytes
font_01_sfnt_off000079a2.bin
6c04a662fe2453818006de453a1cee9c2a3b3b2b03fd3358adab82bf51f55052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A2 15100 bytes

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