Malicious PDF — malware analysis report

Static analysis result for SHA-256 28afcac7d3282eea…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 08:23:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ea44115b2514fd50dc950d198623a52 SHA-1: c5bd99bbd7f1d0ba535f76faf022144ca35e9ee9 SHA-256: 28afcac7d3282eea0e62ab760b2d2ac69cbba7504ff0859437de2326df430128
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The primary heuristic firing indicates that the PDF links to known malicious redirector infrastructure. The document body contains the URL https://ttraff.ru/wix?keyword=fisiopatologia+de+apendicitis, which is likely the initial lure. The file is identified as a malicious redirector, aiming to send users to potentially harmful 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.ru/wix?keyword=fisiopatologia+de+apendicitis
    • https://static.usrfiles.com/ugd/b8c837_fcfb9e3be3f649bc813496de8b74e824.pdf
    • https://static.usrfiles.com/ugd/12745a_da449cc37dab4d9b9ed64e05e3dd37ff.pdf
    • https://static.usrfiles.com/ugd/b8c837_1de383fdc8ff445f9343ab234c04cb5e.pdf
    • https://static.usrfiles.com/ugd/b0b521_85343485b0194d09bb31cd4d2c977f66.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/pm_awas_yojana_mp_form_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7896/6691/files/42226513013.pdf
    • https://cdn.shopify.com/s/files/1/0436/4868/0089/files/attestation_de_prise_en_charge_financire_d_un_tudiant_majeur.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_bc516e3aef07431b87ecb7ab3fc8489f.pdf
    • https://static.usrfiles.com/ugd/bdeb4c_f1e9e202f04d445a9d9f042348b64ce0.pdf
    • https://static.usrfiles.com/ugd/b8c837_40e5a169c2c44989989437d483d790b7.pdf
    • https://static.usrfiles.com/ugd/ca9b0a_ecd6afde36474132a19b759d38f80552.pdf
    • https://static.usrfiles.com/ugd/a01749_8eb59c8f43ea45eca1d12218d523105f.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_off00005d1e.bin
81474ed143995171c0c31f08782106aecaafeb7887c79ba6af67c7f49af4b866		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1E 4888 bytes
font_01_sfnt_off00006dcd.bin
6fa72d339cbda74f5603d5de219b50d8b5089cbbf4307d3dbe581b4ff322c91a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 11064 bytes
font_02_sfnt_off00009165.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9165 4324 bytes

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