Malicious PDF — malware analysis report

Static analysis result for SHA-256 a341e865c90cfd15…

MALICIOUS

PDF

38.3 KB Created: 2020-08-25 03:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5ee1a804aabc893a17a375af0fb254b SHA-1: 61b234cb61df070e54217e096e7c44c122d91e60 SHA-256: a341e865c90cfd156d0f8fd295dd812f59c783c3fc3908838bae12bbbb3de01f
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body contains a call-to-action phrase, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further stages of the attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=hillsong+calvary+audio
    • http://pemeto.katiamoorsdesigns.com/uploads/1/3/0/9/130969472/b39475f2.pdf
    • http://rawepiwa.paperboyproductions.net/uploads/1/3/1/1/131163599/5342072.pdf
    • https://cdn.shopify.com/s/files/1/0430/9581/8397/files/talk_video_kaise_karenge.pdf
    • https://cdn.shopify.com/s/files/1/0430/3015/1330/files/jilenilex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xarapidarobumebavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/introduction_to_statistical_learning_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/ig323_400_mg.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/wijewilusujuwisog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6454/0840/files/tarawivuromigatekav.pdf
    • https://cdn.shopify.com/s/files/1/0440/8243/0117/files/clash_royale_hack_ios_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5690/6918/files/69842939783.pdf
    • https://cdn.shopify.com/s/files/1/0436/3255/8240/files/lodiremorotimisekakikirem.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_off00004abc.bin
1f22c5c625fd541ba157d17ae0395fd6f3f6d5375f2d976a1f5b7592c0e3d43f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABC 4916 bytes
font_01_sfnt_off00005b64.bin
93e5f49455000b1b17c708a9359b4fddd6796b157c568dca2c29baa40a8c4a3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B64 10300 bytes
font_02_sfnt_off00007ea5.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA5 4324 bytes

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