Malicious PDF — malware analysis report

Static analysis result for SHA-256 37a3915478e28d5e…

MALICIOUS

PDF

59.0 KB Created: 2020-07-31 14:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84e77b15b161cf6a35216d02517bd03d SHA-1: 58dc14bcc0eb30b30f77738fc9057571e063a743 SHA-256: 37a3915478e28d5ed6330b290c4cc2a3f529115c39197f4f7bbe9f17c56ccefe
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 in SEO link farms to manipulate search engine rankings or to hide malicious redirects. One of the embedded URLs, 'https://ttraff.com/pify?keyword=bacteremia+e+septicemia+pdf', is identified as a known malicious redirector. The document body appears to be corrupted or heavily obfuscated, preventing a clear understanding of its intended content beyond the presence of 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=bacteremia+e+septicemia+pdf
    • http://files.saaabeoftexas.com/uploads/1/3/1/4/131437766/d2f720d3.pdf
    • http://files.aikenpsr.com/uploads/1/3/1/8/131872079/lazabudibinanet.pdf
    • http://files.beaufortpictureshow.org/uploads/1/3/0/7/130738914/9f14006e89b.pdf
    • http://files.foothillsbiblefellowship.com/uploads/1/3/0/7/130776776/tixanuzipef.pdf
    • http://files.stevenciezkiglass.com/uploads/1/3/1/6/131606984/fef66dd72e2d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8273/files/70892853878.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/sebironi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0279/0039/files/36162803843.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/xesipetozifodugepikawemip.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/voxelisugelazuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6199/1841/files/birozulujej.pdf
    • https://cdn.shopify.com/s/files/1/0432/1227/5870/files/11428469570.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/66326969671.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/xojusogewaravelopoxukonu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/popumuwejomir.pdf
    • https://cdn.shopify.com/s/files/1/0433/8447/1710/files/38245602856.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_off0000aa51.bin
ca7beb9161fb67f86371934e1e7703473f9459c4c9a4ae97f26b153ccc1e157d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA51 4892 bytes
font_01_sfnt_off0000baef.bin
d29f85fba1c02216d0cef587274357693370b837537ec6aa4dcab0b969dc3a11		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEF 10692 bytes

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