Malicious PDF — malware analysis report

Static analysis result for SHA-256 c28bd5b93cd1268a…

MALICIOUS

PDF

40.6 KB Created: 2020-09-03 13:41:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5058c763d6a04160b47ced1f412bf54 SHA-1: 6edff5b4fa49ee8c25e3c6b80f5675cf04696f8f SHA-256: c28bd5b93cd1268a6441e27661c4bb92ca889d03392e1d31b33cd0175020d81a
150 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, pointing to 'https://ttraff.me/wix?keyword=image+editor+apk+free'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into downloading potentially malicious software. The PDF also contains a link farm, indicating a broader effort to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=image+editor+apk+free
    • https://static.usrfiles.com/ugd/f46427_85ff676ea6db4ce98561df541ec86b7f.pdf
    • https://static.usrfiles.com/ugd/097bd5_72196dec9c6e4c79896922da8f48670f.pdf
    • https://static.usrfiles.com/ugd/6cf804_bc0b344b39b04ce6a1587440cd534148.pdf
    • https://static.usrfiles.com/ugd/857e61_3049abbe971e440989887bf121804289.pdf
    • https://static.usrfiles.com/ugd/345929_a849c7f5cdcc4ba4834bfa987370f2e0.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7076/files/62711136791.pdf
    • https://cdn.shopify.com/s/files/1/0429/3813/8783/files/kisebifalu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/avast_antivirus_app_for_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/1155/4980/files/nujipesigonab.pdf
    • https://cdn.shopify.com/s/files/1/0430/4368/4503/files/safadulezumuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/62966390387.pdf
    • https://static.usrfiles.com/ugd/9ea91e_c4eab2c5b3a44b3ba4910056ee1a33e8.pdf
    • https://static.usrfiles.com/ugd/5360f8_2a581e6f430c4232b2fe3219c0df486d.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/ugd/5360f8_2a581e6f430c4232b2fe3219c0d

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000623e.bin
8710fe5ce8cced5ee1eac87cc0593939bf43d1c765809439d6fb2fb4d15fd625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x623E 5152 bytes
font_01_sfnt_off000073b5.bin
281420591b719038ec22363bd5e5b672c5a1f0228f7f3a37e999b03204edb10c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B5 10100 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.