Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed6e8cec6148bca…

MALICIOUS

PDF

55.3 KB Created: 2020-08-08 18:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3dd220dd24cf61fe28bbc458b6cac218 SHA-1: 7b0048b8423fbe495d8088c78313c356b6f56832 SHA-256: 7ed6e8cec6148bcadc9ddfdb641b968e815ff212e6bcb8ab7bbf672dc8b373e5
120 Risk Score

Malware Insights

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

The PDF file was flagged for containing a large number of external links, indicative of a link farm, and specifically a link to a known malicious redirector at `https://ttraff.ru/pify?keyword=anhalteweg+formel+pdf`. This suggests the document's primary purpose is to lure users to malicious websites. The document body itself is heavily obfuscated and contains the same URLs, reinforcing the malicious redirection intent.

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.ru/pify?keyword=anhalteweg+formel+pdf
    • http://files.beautyessencebymerabell.com/uploads/1/3/2/6/132695525/penagikivajixijolej.pdf
    • http://files.senkohrs.com/uploads/1/3/0/9/130969657/1737241.pdf
    • http://files.serenehomebirth.com/uploads/1/3/2/6/132695200/b88f4969898f.pdf
    • https://cdn.shopify.com/s/files/1/0435/2566/9028/files/nugegeliro.pdf
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/adobe_premiere_pro_cc_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5601/3205/files/55500873620.pdf
    • https://cdn.shopify.com/s/files/1/0432/7433/8454/files/57119826509.pdf
    • https://cdn.shopify.com/s/files/1/0434/0239/5813/files/24798873912.pdf
    • https://cdn.shopify.com/s/files/1/0428/3888/4519/files/83025773448.pdf
    • https://cdn.shopify.com/s/files/1/0431/3976/0285/files/a_sample_of_slime.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/wimuratudipewizo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3780/2146/files/20279270816.pdf
    • https://cdn.shopify.com/s/files/1/0440/7063/3624/files/vufisakameri.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9628/files/github_delete_a_branch.pdf
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/logic_gates_and_truth_tables_questions_and_answers.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_off00008f1e.bin
09f8fa53fc91ad1f5e42b359537ee8d72d480990807074e6840a151550179157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1E 5360 bytes
font_01_sfnt_off0000a148.bin
0131a302fa6bb08adc6a4109834b6ffbf84d47b0bb560ca335e658964a70dcfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA148 14696 bytes

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