Malicious PDF — malware analysis report

Static analysis result for SHA-256 3338d0abf9386259…

MALICIOUS

PDF

59.1 KB Created: 2020-09-07 22:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 732145ca4c76ec1bd308087ec74a859c SHA-1: fea00e2a1a09d0d872c4f83af1a5ff7d18f735ce SHA-256: 3338d0abf93862594c89345290d930374fe47fd913afe83d8f8c72353bf84e03
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The link leads to a URL that appears to be a lure for job applications, suggesting a phishing or social engineering attack. The PDF also contains a large number of embedded links, indicating a link farm, likely for SEO poisoning or to obscure the malicious destination.

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.me/pify?keyword=kpt+jobs+application+form
    • https://static.usrfiles.com/ugd/6908d7_2855f7e69ca04f819ba2ef52c15d4a25.pdf
    • https://static.usrfiles.com/ugd/ba3095_efc254c2d7fd4c5aa82fed991ee8d843.pdf
    • https://static.usrfiles.com/ugd/b88e3d_c2242df99bcf41f3891ecdf450a1ee83.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/78092405938.pdf
    • https://cdn.shopify.com/s/files/1/0444/0319/6070/files/ap_grama_sachivalayam_jobs_2020_notification_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6594/1917/files/27177891610.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/90336957200.pdf
    • https://cdn.shopify.com/s/files/1/0463/6537/6673/files/jikobexagufalovusago.pdf
    • https://cdn.shopify.com/s/files/1/0428/0107/0247/files/kowepuviviragu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7542/6722/files/biophysical_techniques_in_drug_discovery.pdf
    • https://cdn.shopify.com/s/files/1/0450/9591/1577/files/thesaurus_english_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/20893826048.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/
    • https://static.usrfiles.com/u

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009d40.bin
3f765e487714b1294c6240d3e6a68c4fe3e41d58875db2ae979a7efffd7a6fe8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D40 5348 bytes
font_01_sfnt_off0000af5a.bin
a6283b21aad0ad2400fa8779a61b41ebd9264f1b8bef91c9a3a213ebccc76d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF5A 15576 bytes

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