Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c8c10cdd3d5705…

MALICIOUS

PDF

39.1 KB Created: 2020-08-25 01:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7447353e49bef55266d3861ecd08ffe9 SHA-1: fd73fd94c97c405dcce52e7e6cf5514ee3a2f566 SHA-256: 56c8c10cdd3d570537aa6a4fbf4f7702e60b21dae86c3d1bd1d3315397eb4fed
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=year+3+inferential+comprehension+worksheets'. This URL is presented within the document body, disguised as educational worksheets. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify domains, likely to obscure the malicious redirector. The primary intent appears to be directing users to malicious infrastructure under the guise of providing educational content.

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/pify?keyword=year+3+inferential+comprehension+worksheets
    • http://files.hchsmusic.com/uploads/1/3/1/6/131606069/lubasovupol_xadar_jitulububukefo_rovivamow.pdf
    • https://cdn.shopify.com/s/files/1/0434/3077/2892/files/gukirev.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/10895219391.pdf
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/7017389897.pdf
    • https://cdn.shopify.com/s/files/1/0428/1994/4615/files/63002258053.pdf
    • https://cdn.shopify.com/s/files/1/0440/2629/8533/files/force_and_destiny_rulebook.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/64043740928.pdf
    • https://cdn.shopify.com/s/files/1/0437/6598/9530/files/gamenevanotizusonub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6265/7177/files/43865364637.pdf
    • https://cdn.shopify.com/s/files/1/0439/3785/7691/files/duwutexumanumuponotonetu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9118/9157/files/deductive_reasoning_in_mathematics.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9259/files/bsc_1st_year_physics_practical_book.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_off00004ee3.bin
5573418f2cf3482847885ab96a95571e904e84e47ea727f2ca433719ada9ad75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EE3 5324 bytes
font_01_sfnt_off000060d1.bin
0860446e6eeab32205c27e570a8f37965ca12a7cb642232b4cd4f3578f6b6118		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60D1 9524 bytes
font_02_sfnt_off00008152.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8152 4324 bytes

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