Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcac28ed0e69bd28…

MALICIOUS

PDF

40.4 KB Created: 2020-08-04 15:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71d914a0f187db527e7b035de3a4cf9f SHA-1: 599f4f9055c08fce158da80df0b1e6b46862acfc SHA-256: dcac28ed0e69bd284e74b73db5f7aa47bc8984b758500e2a8be6e32a08510e58
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=aptis+mock+exam+pdf'. The document body also contains this URL, suggesting the PDF's primary purpose is to trick users into visiting this malicious site. The presence of numerous other external PDF links, many hosted on Shopify, indicates a link farm strategy 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.cc/pify?keyword=aptis+mock+exam+pdf
    • http://files.talkingaboutscience.com/uploads/1/3/1/6/131637136/fesolefigejelot_kuropafu_siruzovuza.pdf
    • http://files.chezhospice.org/uploads/1/3/1/8/131871625/8487877.pdf
    • http://files.cjbeagle.com/uploads/1/3/2/3/132303023/xuzowad_jenuso_bijasokatu.pdf
    • http://files.cuttingedgepoodles.com/uploads/1/3/1/6/131607029/pimiwamozili.pdf
    • https://cdn.shopify.com/s/files/1/0429/5681/6540/files/acknowledgement_for_training_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8843/7655/files/povoxofixuxizaxekewaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ranugebiwuzejivuzuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2329/3864/files/comment_assembler_deux_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/arthritis_research_hip_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/dufeponujonoxode.pdf
    • https://cdn.shopify.com/s/files/1/0431/3874/4476/files/nenivowalupiromorapi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8306/3715/files/real_and_complex_analysis_rudin.pdf
    • https://cdn.shopify.com/s/files/1/0436/1525/6738/files/60934001249.pdf
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/pemidazusetetu.pdf
    • https://cdn.shopify.com/s/files/1/0446/0825/8211/files/vocal_training_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/5369/4626/files/jibimawapebet.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/pivedelikixezagu.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_off000053fa.bin
a47bdcd133a6a17488bab1d6d907b8c24cbcd44e6a31b13bf2c2bfabbfd87384
pdf-font-stream PDF embedded font (sfnt) at offset 0x53FA 4976 bytes
font_01_sfnt_off000064f0.bin
67c9f249853587eccfeb03700d5ed1548e29f19dc048fb7024be954ef78e72d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F0 9884 bytes
font_02_sfnt_off000086c3.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C3 4324 bytes