Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae880e184a0d4c50…

MALICIOUS

PDF

72.4 KB Created: 2020-07-30 15:52:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ca51fa1889128e1dc744b9d13c315b SHA-1: 0545c0b76e09ddf69de83db48ed283801b0bbbf2 SHA-256: ae880e184a0d4c50d8adf789207218444e5990795f604a78ab17ed06195dd3bf
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=fisiopatologia+placa+de+ateroma+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain metadata related to PDF generation, suggesting the content itself is not the primary lure but rather a vessel for the malicious links.

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/pify?keyword=fisiopatologia+placa+de+ateroma+pdf
    • http://files.harrisoncountyfrn.org/uploads/1/3/1/0/131070625/9408508.pdf
    • http://files.arme-international.com/uploads/1/3/0/7/130739651/fe65f3.pdf
    • http://files.davisionentertainment.com/uploads/1/3/1/3/131378852/4dc98.pdf
    • http://files.augustatnba.com/uploads/1/3/0/7/130776265/5b20a7.pdf
    • https://cdn.shopify.com/s/files/1/0436/2646/3385/files/xageduxojenu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6935/7728/files/sizuzozegipawozebubamuri.pdf
    • https://cdn.shopify.com/s/files/1/0439/5086/6590/files/vuzedipubepanikemomuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/17156685540.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/79371118053.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/gixebiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/7818/8198/files/savodibojotakegelod.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/97497280624.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/10234138611.pdf
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/kowivoselexopurop.pdf
    • https://cdn.shopify.com/s/files/1/0431/9592/4640/files/76302772330.pdf
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/51518807748.pdf
    • https://cdn.shopify.com/s/files/1/0437/6412/1749/files/kituka.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_off0000df6c.bin
5d74260918a1a62de38125b36625086ff49f28f1e0386e7874342747e4e85de5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6C 5112 bytes
font_01_sfnt_off0000f0d4.bin
aac59d7af71fc574c21b85bccc6d2749a2e3405efaa8e75f76fce53f9d37a5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D4 10572 bytes

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