Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bd1a8a01ac908d…

MALICIOUS

PDF

40.4 KB Created: 2020-08-05 14:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92342309d8a382c472ca5ab3fd83e9f6 SHA-1: 91c9cda77ca4e93ed4dc64ef58a0a8a15a94eebb SHA-256: 91bd1a8a01ac908d79789e987fdecc093768d042b42e2ce41e3dd3526d6d8e26
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is embedded within the document body and is designed to lure the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a link farm. 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.cc/pify?keyword=casamento+div%25C3%25B3rcio+e+novo+casamento+hernandes+dias+lopes+pdf
    • http://files.moqsports.com/uploads/1/3/1/6/131607093/fodokirodexusa-zetapedo.pdf
    • http://files.darranparkprimary.com/uploads/1/3/1/4/131437766/bujamumefutib_wuliv_sapawo_begitavajedu.pdf
    • http://files.avikigames.com/uploads/1/3/1/4/131408798/af2edb4a3.pdf
    • http://files.quiknfresh.com/uploads/1/3/1/6/131607063/8f21820e.pdf
    • https://cdn.shopify.com/s/files/1/0440/6083/6005/files/lisodidobowimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4634/files/rifumokidotewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/zabukosapijupila.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/32011143587.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/71036271845.pdf
    • https://cdn.shopify.com/s/files/1/0438/8693/6219/files/kubofomewanurotobe.pdf
    • https://cdn.shopify.com/s/files/1/0433/3712/1951/files/jolly_phonics_workbook_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/2044/3045/files/gifak.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7095/files/diguvufogunemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/7268057193.pdf
    • https://cdn.shopify.com/s/files/1/0432/7351/9269/files/635577497.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/convolutional_autoencoder_keras.pdf
    • https://cdn.shopify.com/s/files/1/0430/0016/8597/files/danavuz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f59.bin
3c6413ece59eead5f5195ad6f866d9011a1f0120553e5b43acb32bb1e7f4b91f
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F59 2864 bytes
font_01_sfnt_off0000598a.bin
de66814a30af6d8a40e17eab38bc3d21ca124c5c9d45a83286f11c64241a6496
pdf-font-stream PDF embedded font (sfnt) at offset 0x598A 5496 bytes
font_02_sfnt_off00006bd4.bin
fd70589b868be083a977fcd1a57758edc62ea52cfc54b00c08113e3b714e433d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD4 11684 bytes