Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2057a36e6f76580…

MALICIOUS

PDF

48.6 KB Created: 2020-08-04 10:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 941b699bb31184062b76e4aaef80f286 SHA-1: 189f496b395b52238e789d6858e25076f1ccfaf6 SHA-256: d2057a36e6f765806a50676983dfa099e066006bda8ca4917fa310a5edc57798
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, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=biopsychology+pinel+6th+edition+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify and other domains, suggesting a link farm designed to lure users to malicious sites under the guise of providing PDF documents. No scripts were extracted from this sample.

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=biopsychology+pinel+6th+edition+pdf
    • http://gorud.quiltstudio55.com/uploads/1/3/1/3/131380729/ff38f65b9b4ecdf.pdf
    • http://files.ninastanic.com/uploads/1/3/0/8/130873810/nited.pdf
    • http://files.jlongkandb.co.uk/uploads/1/3/1/6/131606368/da1337258866eff.pdf
    • http://files.graceinwellsville.com/uploads/1/3/0/9/130969917/6286939.pdf
    • https://cdn.shopify.com/s/files/1/0431/6495/8879/files/lupudifogovugudigejaper.pdf
    • https://cdn.shopify.com/s/files/1/0435/1688/7192/files/beta_oxidation_pathway.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/99744184538.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/raspberry_pi_bluetooth.pdf
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/zugufalo.pdf
    • https://cdn.shopify.com/s/files/1/0438/7222/3387/files/revokifetugasigagik.pdf
    • https://cdn.shopify.com/s/files/1/0434/8477/4552/files/39242747340.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0434/8382/4294/files/nevutatorejagerokafe.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/mowipemabodupuxafipijax.pdf
    • https://cdn.shopify.com/s/files/1/0439/2442/2811/files/4456382454.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_off00008092.bin
33f08486c3eb558537e8af779d25f6b69eff5f4685ab5dba4ebb8176e3196677		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 5416 bytes
font_01_sfnt_off00009318.bin
a2d4bfc915c457a43cf19b1c4471a57a83f916d4543678cd683fdc8dffc95839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9318 10152 bytes

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