Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1198241c481c61…

MALICIOUS

PDF

38.8 KB Created: 2020-08-09 09:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b06d6b6ea25c8210418e8c63ef1627d SHA-1: 752729b4743e4f20a50f9e5a8308ae8c174012d1 SHA-256: 4a1198241c481c61bebd5d92e2635b5474eea5cd3f954bb18e8253674414db7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a visible link that redirects to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, suggests a lure related to a 'personality plus test pdf'. The 'SE_LOLBIN_RUN_COMMAND' heuristic indicates the presence of instructions or visible command text involving Windows execution tools, suggesting a potential secondary stage or exploit execution. The PDF also hosts a large number of external links, as flagged by 'PDF_SEO_LINK_FARM'.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=personality+plus+test+pdf
    • http://files.kpcdesign.org/uploads/1/3/2/6/132682868/3198935.pdf
    • http://vonuluxa.onmelights.com/uploads/1/3/0/8/130814328/7647939.pdf
    • http://files.johnthomsbehaviormethod.com/uploads/1/3/1/3/131379718/705ee1d709.pdf
    • https://cdn.shopify.com/s/files/1/0431/5545/6149/files/curl_content_type.pdf
    • https://cdn.shopify.com/s/files/1/0431/3749/9302/files/84335798238.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/munununexarusod.pdf
    • https://cdn.shopify.com/s/files/1/0431/5519/4011/files/zufufisagigik.pdf
    • https://cdn.shopify.com/s/files/1/0437/0720/3739/files/85267427957.pdf
    • https://cdn.shopify.com/s/files/1/0430/2975/8103/files/60668812463.pdf
    • https://cdn.shopify.com/s/files/1/0437/6880/7586/files/beasts_of_no_nation_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/nonagud.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/60280075500.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/cadver_exquisito_agustina_bazterrica.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_off00005846.bin
d3b3e26abd210d42734020e759ea16d2b476773242e9d41aa366b44e5ae4837e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5846 5140 bytes
font_01_sfnt_off000069d9.bin
93ac20f1a1d09e7893bb906448f877630e64f6a4723c763eab9d52f4df355df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D9 10840 bytes

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