Malicious PDF — malware analysis report

Static analysis result for SHA-256 37310573a5cfeeca…

MALICIOUS

PDF

47.8 KB Created: 2020-08-10 02:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ccd750e37a86799b95986742c8bbc7a SHA-1: cdbfc77e19d4ce08f48469e8c19aa84a8217a0e4 SHA-256: 37310573a5cfeeca855f5f78897c8e9ada725649cd4ab1610cd69f011f68ea75
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to benign Shopify domains, but one critical link redirects to a known malicious domain, ttraff.cc. The document body text is heavily obfuscated but contains the string "Statin guidelines 2020 pdf" and the malicious URL, suggesting a lure to disguise the malicious redirector. 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.cc/pify?keyword=statin+guidelines+2020+pdf
    • http://files.dunlapcoc.org/uploads/1/3/0/7/130739809/47821ad9171ad.pdf
    • http://files.sqrlzinc.com/uploads/1/3/1/8/131871439/3650316.pdf
    • http://fojigasof.agodfreytranslations.com/uploads/1/3/0/7/130776485/gisulinolewimi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4736/1439/files/mac_preview_add_png_to.pdf
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/40030299914.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdf
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/wujibibamogelugelezadix.pdf
    • https://cdn.shopify.com/s/files/1/0434/3241/1298/files/auditoria_em_sistemas_de_informao.pdf
    • https://cdn.shopify.com/s/files/1/0429/8768/4003/files/62660747468.pdf
    • https://cdn.shopify.com/s/files/1/0437/1136/5288/files/pravana_color_chart.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/pezidewujidivalata.pdf
    • https://cdn.shopify.com/s/files/1/0437/8486/3893/files/american_government_clep_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/5673/4109/files/xebotezovejugas.pdf
    • https://cdn.shopify.com/s/files/1/0437/1959/0040/files/34932874410.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gadawatozuwagujezudoru.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/43148063432.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nipexaledova.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_off00007b44.bin
a9e269eaeb2587e82c2678d8ba991374f8377bba63f512966196bf005b6afdda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B44 5488 bytes
font_01_sfnt_off00008e0e.bin
28d81a8fd79d98f330e0519fb5c138e7f2f3052b10d8c82a9d3dde9cfed3425b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E0E 10496 bytes

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