Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc16d4d46ce14710…

MALICIOUS

PDF

34.0 KB Created: 2020-08-31 00:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e828ae7e994623d63b38a1526055170 SHA-1: 60bf1cba5df5e9d0513d1afffe9a5975098679f6 SHA-256: dc16d4d46ce14710571a18593d8e2a8b8fa1f81673b9a4f72e5ccd96d8ceda57
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the primary attack pattern is to lure users into clicking these links, likely for SEO spam or to redirect to phishing sites. No scripts were extracted, limiting further analysis of the payload.

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/wix?keyword=%25C3%25BCcretsiz+hayvan+porno+galeriler
    • https://cdn.shopify.com/s/files/1/0431/1610/1798/files/can_calibre_convert_to_kindle_format.pdf
    • https://cdn.shopify.com/s/files/1/0431/2865/1938/files/kosokovexijanuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/6787/5228/files/nonakebupimire.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6914/files/grammar_and_vocabulary_for_cambridge.pdf
    • https://cdn.shopify.com/s/files/1/0437/4154/4600/files/fisetunevekese.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5157/files/eyes_copy_and_paste.pdf
    • https://static.usrfiles.com/ugd/ac51ce_f347cb9662294bbbae5c9b29d22d5e62.pdf
    • https://static.usrfiles.com/ugd/f0e51d_1c5cd1ff1e294a2db9a92ffcd6d47c34.pdf
    • https://cdn.shopify.com/s/files/1/0437/3017/4113/files/maths_basic_formulas_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/cengel_thermodynamics_7th.pdf
    • https://cdn.shopify.com/s/files/1/0432/8164/5736/files/abas_ii_manual.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_off000043d6.bin
db54acd9c892183f131b743764fc1e2f3a5c5daa11c99d34485b5dd9729d77c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x43D6 5420 bytes
font_01_sfnt_off00005650.bin
ad4b46683c7dda16f15141c45fa20dffd6ee410263da6b3f9c4021bd9151b57c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5650 11364 bytes

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