Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec9086c5b3f2189…

MALICIOUS

PDF

37.6 KB Created: 2020-08-30 11:12:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66f668e6c013b9b0468ad85b5c43cdbf SHA-1: c5676d1ee0b32ff4c5de7c140720520a08aa42bc SHA-256: 4ec9086c5b3f2189f1833728cb453a66c07692db18c5dd9edb09de4b242b45f8
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily corrupted, contains fragments of text and URLs, including the malicious redirector and a link to a Shopify-hosted PDF. This suggests an attempt to lure users to malicious infrastructure through a link farm or SEO manipulation tactic.

Heuristics 3

  • 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.
  • 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.com/wix?keyword=problemas+de+g%25C3%25AAnero
    • https://cdn.shopify.com/s/files/1/0438/6874/9979/files/53975611380.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/quirke_ancient_egyptian_religion.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/34458263584.pdf
    • https://static.usrfiles.com/ugd/9b5f63_27433341d46647d6a7a068f50f659c5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_be3b6c19ec5842778bde5634da6edbf4.pdf
    • https://static.usrfiles.com/ugd/238140_d230054063274fd5a48e739a0d07170f.pdf
    • https://static.usrfiles.com/ugd/b8c837_c67ac548abd5477f94ec77f1fc2067fa.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/bow_wow_meow_cruciate_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/47724791926.pdf
    • https://cdn.shopify.com/s/files/1/0434/0210/0886/files/14409018648.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/the_prize_julie_garwood.pdf
    • https://cdn.shopify.com/s/files/1/0434/4712/4135/files/ct_guided_biopsy_lumbar_spine_cpt_code.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/62606602753.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/9211958656.pdf
    • https://cdn.shopify.com/s/files/1/0428/7882/8700/files/vekojodozamonuxedarozilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/17215300995.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_off00005117.bin
ad11404fc17b66ce0449bacd296b70e5421e651bf64b3455b69f7914e5d6d6cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5117 5436 bytes
font_01_sfnt_off0000632d.bin
82d0ba23e30876dbf2a6909e5dcfb49c1d713863f653714495d1f7d30a87a584		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 11656 bytes

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