Malicious PDF — malware analysis report

Static analysis result for SHA-256 21a14f81c8dd5aa4…

MALICIOUS

PDF

42.0 KB Created: 2020-08-31 22:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e672eeb4776c3aba5cd88351cf335e SHA-1: 5997122fd19fb1a50929f2552ecc1eb671123af6 SHA-256: 21a14f81c8dd5aa42f078bd505256a7b67ec9329319fad664ad4d1b5771f7b2e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains text referencing 'editable html templates' and the malicious URL. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=editable+html+templates
    • https://static.usrfiles.com/ugd/b91566_c7bfe79e79474f84b818059fc9328d2a.pdf
    • https://static.usrfiles.com/ugd/36f25b_316d1d1a24704d5ca7ce7e7e2e2f7e8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5d26706714284b4f9fb624b41232f538.pdf
    • https://static.usrfiles.com/ugd/b8c837_a46413f93bea471f91ff10ad93fa8fcd.pdf
    • https://static.usrfiles.com/ugd/b65acf_93b8bc94faa846b8b17ceed2d18836f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ed621cae4ff4374b95ba5c56f3b0acf.pdf
    • https://static.usrfiles.com/ugd/e3ff21_d7c414bbf778409080be2c753c8d12fb.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc08f15142aa476e932659dbf9068f2d.pdf
    • https://static.usrfiles.com/ugd/6cf0f5_be84bc2e7daf4898873e23e3ab079a65.pdf
    • https://cdn.shopify.com/s/files/1/0428/5267/9836/files/nofegatotemaju.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8541/files/flightpath_teacher_s_book_aviation_english_for_pilots_and_atcos.pdf
    • https://static.usrfiles.com/ugd/ade4e6_0278d44b8c4d41aa8e446be4c336b0f8.pdf
    • https://static.usrfiles.com/ugd/0c8cc8_eabd138aadb3412ab2b912c18bffe95f.pdf
    • https://static.usrfiles.com/ugd/3f0e57_8ed1956dc54c490989a948bef4d650b7.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_off00005b61.bin
6d28f8e1a54b1bfbcf1d9f32312dbb9e16b337405452ea1415d978f6ade495d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B61 4772 bytes
font_01_sfnt_off00006b8f.bin
e47ea6a07a402bfe01b83c15f06f7a0fbe645164be0b4cfd59d381da611806c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8F 9808 bytes
font_02_sfnt_off00008d0c.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0C 4324 bytes

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