Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc48a9c7b795ebb2…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 12:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93c6cba36e7798e2aeecc180b14e2feb SHA-1: 18cc4c55ebeab72ea8654c3bb7f2aa874221e08f SHA-256: fc48a9c7b795ebb2998461e55216d9b145a1a4a79248e2f2a9a2f737a5b3b7f8
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/wix?keyword=scoliosis+exercises+pdf'. This URL is designed to lure users under the pretext of providing scoliosis exercises. The document also contains a large number of embedded links, many pointing to static.usrfiles.com, which is flagged as a link farm. The primary intent appears to be redirecting users to malicious infrastructure.

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/wix?keyword=scoliosis+exercises+pdf
    • https://static.usrfiles.com/ugd/b8c837_109c11e779594eff83c1b5f4ee0ce557.pdf
    • https://static.usrfiles.com/ugd/b8c837_5924d111f715418a98d4d1b327a3dbb8.pdf
    • https://static.usrfiles.com/ugd/a4d998_65b215e183df427492d2910552f3254c.pdf
    • https://cdn.shopify.com/s/files/1/0429/1251/4201/files/50510775113.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/marobebemesapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/16423736867.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8de1a510741490685f51a983956bd75.pdf
    • https://static.usrfiles.com/ugd/b8c837_be7fa280f0f7406d832ece9bff050d7e.pdf
    • https://static.usrfiles.com/ugd/2b3f46_c02645a21c2a498e8bbabdb9bdbc1d2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_354df30bc46644f79a13d221175f54f0.pdf
    • https://static.usrfiles.com/ugd/136d07_9e5b9930da59448e8081f875a10504c7.pdf
    • https://cdn.shopify.com/s/files/1/0437/7948/9950/files/zadutixofaniferon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/zonedukav.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/how_to_cancel_directv_without_penalty_2016.pdf
    • https://cdn.shopify.com/s/files/1/0430/9693/2505/files/44873009548.pdf
    • https://cdn.shopify.com/s/files/1/0434/8697/0018/files/newsletter_design_templates_psd_free.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_off00006b88.bin
c9f15f94c0eb0dbad75332d4d86b7d58f6fcf8c5bc016123bfb8b3d6aa04126a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 5112 bytes
font_01_sfnt_off00007cf7.bin
0f5634013afc88cca3735d4f3111a41a0005d5bc521db558a365592962016e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 10004 bytes

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