Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ef50cc0db15b6a…

MALICIOUS

PDF

41.6 KB Created: 2020-08-27 22:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a9e63109cef3acf3b8247a50e9002c3 SHA-1: 35787b38af2a544db6b09117d396ed63c62e264c SHA-256: c6ef50cc0db15b6a487a3a4f369a983d4a16c82fa69600aa964355d5bcc916dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1204.002 Malicious File

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Samsung screen mirroring' and includes the malicious URL. The presence of a remote support tool lure heuristic further suggests the intent is to trick the user into installing potentially unwanted software or visiting a malicious site.

Heuristics 4

  • 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=samsung+screen+mirroring+pc+windows+7
    • http://jobokutix.grapevinerealty.com/uploads/1/3/0/7/130738511/93a5228e7e.pdf
    • http://files.jjmjs.org/uploads/1/3/2/6/132695384/bowupusi.pdf
    • https://cdn.shopify.com/s/files/1/0432/0886/8001/files/pekidudovez.pdf
    • https://cdn.shopify.com/s/files/1/0461/8918/3129/files/61650608877.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/60152311223.pdf
    • https://cdn.shopify.com/s/files/1/0437/8093/1733/files/sotuwafepawamu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/3029836889.pdf
    • https://cdn.shopify.com/s/files/1/0431/4457/7178/files/25336942260.pdf
    • https://cdn.shopify.com/s/files/1/0435/5896/1320/files/48050100609.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7007/files/zusabolomore.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/pid_code_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/2392/4376/files/13740170190.pdf
    • https://cdn.shopify.com/s/files/1/0432/0634/4863/files/factoring_quadratic_equation_worksheet_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/9623/6447/files/729088400.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_off00006164.bin
e078ae2d0c51221b28efbe23d9666cf6822d8fd5eeb40f7ea91ad05c8789a8fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6164 5636 bytes
font_01_sfnt_off00007488.bin
253cc226a044b92b2923019a9859f7667b242ed56cdd93e803d142c32984955e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 10968 bytes

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