Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb3b44b159dcff8…

MALICIOUS

PDF

39.0 KB Created: 2020-08-22 19:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6c2901b4ed88164af73173ad9acc4521 SHA-1: 058a5ba97b7647b464745b6bb4ef0f1ef1b731c0 SHA-256: adb3b44b159dcff8942f7ab4f98d14f4e7735040b7d788abc61c4000ed308ffa
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic. This suggests the PDF is designed to redirect users to malicious infrastructure, likely for further exploitation or credential harvesting.

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=cause+and+effect+words+pdf
    • http://binumupiz.sidleymountainoutlaws.com/uploads/1/3/1/8/131857315/waziferotodupir.pdf
    • https://cdn.shopify.com/s/files/1/0437/5815/7982/files/97873135499.pdf
    • https://cdn.shopify.com/s/files/1/0429/0818/8839/files/38970386064.pdf
    • https://cdn.shopify.com/s/files/1/0435/6882/4488/files/20128951135.pdf
    • https://cdn.shopify.com/s/files/1/0433/8201/4108/files/nusadusi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/pajiwujiteba.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/efectos_del_alcohol_en_el_cerebro_y_sistema_nervioso.pdf
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/36814938339.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/josilurajolokexilog.pdf
    • https://cdn.shopify.com/s/files/1/0459/9824/3999/files/denotation_and_connotation_worksheets_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6325/4944/files/arbitration_act_1940_pakistan.pdf
    • https://cdn.shopify.com/s/files/1/0448/5208/4898/files/do_not_turn_off_target.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_off00005c59.bin
098896c696c75bd50b60b390bd36fcb83b6f818f984f225cb853e56d321d07e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C59 5112 bytes
font_01_sfnt_off00006ddc.bin
468f4b48979af22091eeb871ce2a748d2a23c79ee0bb9cbe5e8322e23235316f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 9872 bytes

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