Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95b081dac28da3d…

MALICIOUS

PDF

53.4 KB Created: 2020-09-12 13:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662517d3a718fc3a34f1e462fa531696 SHA-1: 3ae4e6e54f03290db54b88f3568062c2e42d1444 SHA-256: a95b081dac28da3d2f572a75a1529c36713494602a89844027ec13e240452c08
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=admit+card+rrb+ajmer'. This URL is embedded within the document body, suggesting a social engineering lure related to exam admit cards. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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=admit+card+rrb+ajmer
    • https://cdn.shopify.com/s/files/1/0432/1899/3320/files/mepamupixoz.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/57728675279.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/rufadexofabakirekur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9318/1087/files/51780107009.pdf
    • https://cdn.shopify.com/s/files/1/0439/6243/3694/files/tipicidade_formal_e_material_penal.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_720ccd2bfcae40d993e4f50607adceeb.pdf
    • https://static.usrfiles.com/ugd/9e41f0_f5ee0c9fef64485aa32e109538a83716.pdf
    • https://static.usrfiles.com/ugd/253000_782c9fdcf82a478caa13e87cb43a948a.pdf
    • https://static.usrfiles.com/ugd/111c46_37fe4323cb464d7ca1c413c3f7e200da.pdf
    • https://static.usrfiles.com/ugd/89363e_8dfd6faa3ed84778ba8e23fda2481858.pdf
    • https://static.usrfiles.com/ugd/43d598_fa08e076c6a14de594b8b6b784675dd2.pdf
    • https://cdn.shopify.com/s/files/1/0433/8896/0933/files/maths_calculator_revision_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0447/0436/6748/files/vokulovovezirezasapulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/nidewoputupijewagebipesi.pdf
    • https://cdn.shopify.com/s/files/1/0445/4455/7220/files/joduma.pdf
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/23847301927.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000753c.bin
95dc980c0aeb04b8ea692264268edc0100001025200b44e16820ec1785f1581f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x753C 5080 bytes
font_01_sfnt_off00008663.bin
bb78291ff7512ed6a691b9754c79d78e1eaccadf10cda256ae74c1527a31a8e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 2400 bytes
font_02_sfnt_off0000912d.bin
639001dc8796ddd70d9643172612aa4b6d5c61aaf82826ba4b3bd76cd581bf2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x912D 9736 bytes
font_03_sfnt_off0000b2c0.bin
dbe1f6873dfbc63a557840fa26764ed1e24daf10180a919a5f50e881975b6f06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C0 16148 bytes

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