Malicious PDF — malware analysis report

Static analysis result for SHA-256 d28df82ab585b229…

MALICIOUS

PDF

41.7 KB Created: 2020-08-06 10:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b67db9fba8deffb71fc669ea778c3ff SHA-1: b35c36703fd073f31ef28ef737dd5bd55d980701 SHA-256: d28df82ab585b22925919ac3c1c030d3d960da26a6aac29b5b0e346da19c6a98
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'Hepatit b tedavi pdf' and the authoring application 'wkhtmltopdf', suggesting a lure to entice users to click the malicious links. The primary malicious IOC is the redirector URL.

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/wb?keyword=hepatit%20b%20tedavi%20pdf
    • http://files.william-balog-philanthropy.com/uploads/1/3/2/7/132740480/4f1ad1871.pdf
    • http://files.keenecinemas6.com/uploads/1/3/1/3/131383456/dabetejajuw.pdf
    • http://files.sweetcakedetails.com/uploads/1/3/0/8/130873708/furozarifor.pdf
    • http://files.mikaelpettersson.net/uploads/1/3/0/7/130739004/495fc750f.pdf
    • https://cdn.shopify.com/s/files/1/0427/9776/0668/files/tower_of_heaven_secrets.pdf
    • https://cdn.shopify.com/s/files/1/0434/8759/2608/files/88861181532.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/82037939507.pdf
    • https://cdn.shopify.com/s/files/1/0437/8584/6945/files/nikesiselumur.pdf
    • https://cdn.shopify.com/s/files/1/0433/5638/9528/files/jurnal_ekstrak_daun_binahong.pdf
    • https://cdn.shopify.com/s/files/1/0433/6189/4565/files/jewikavenedir.pdf
    • https://cdn.shopify.com/s/files/1/0435/3431/9776/files/15369528579.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/23428464638.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5949/files/rajeselorelidalowuzig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/business_model_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/3184/6296/files/dufexelajujaromoxasig.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/11524248562.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/94061295363.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_off0000630e.bin
bc8c1e937526cc56824e523a58db2882c0d40a172213dca777a88952938ba465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 4892 bytes
font_01_sfnt_off000073c9.bin
d82dfbb5fb933fc3600cb67e77b551a09941aa4d820ca65f6bafe2cf57aa4580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C9 11640 bytes

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