Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65ba36ca96b7b47…

MALICIOUS

PDF

41.3 KB Created: 2020-08-10 12:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b6cfe5408669a207b61e022ffee949 SHA-1: b87ab8a122cfe06fbb394d4ea7c422c3dc27914e SHA-256: b65ba36ca96b7b47f44459c54b59aedba4c1324cb076bb56e40a279ee35c4853
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO spam and malicious redirection. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though partially corrupted, suggests a lure related to an 'alliteration and assonance worksheet pdf', indicating a social engineering pretext to encourage link clicks. No scripts were extracted, but the presence of multiple PDF links points to a link farm or redirection campaign.

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.com/pify?keyword=alliteration+and+assonance+worksheet+pdf
    • http://budip.enlightensatori.com/uploads/1/3/1/4/131452903/kekuxirukaku.pdf
    • http://files.aufuturclothing.com/uploads/1/3/1/6/131636834/togomekisebaj.pdf
    • http://files.yogaaah.com/uploads/1/3/2/3/132302894/xesemi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7491/0376/files/17978760626.pdf
    • https://cdn.shopify.com/s/files/1/0434/4840/2081/files/99961127054.pdf
    • https://cdn.shopify.com/s/files/1/0434/7697/5768/files/10296725611.pdf
    • https://cdn.shopify.com/s/files/1/0440/5002/2550/files/lenilejafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2028/files/28591218890.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/6719312275.pdf
    • https://cdn.shopify.com/s/files/1/0433/5583/2469/files/37178937306.pdf
    • https://cdn.shopify.com/s/files/1/0439/3923/3960/files/durabilt_air_compressor.pdf
    • https://cdn.shopify.com/s/files/1/0430/1642/1539/files/xetiraligimukofegutifap.pdf
    • https://cdn.shopify.com/s/files/1/0432/0460/8155/files/58270990390.pdf
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/27640566630.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_off0000646e.bin
65bd8a823bfda5c7df92af94f116cf77ccc94b18a01da2dac37d074238cbdd67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 5388 bytes
font_01_sfnt_off000076cf.bin
c499af5abf4e683bbcc40fb2160d50a268eb5ca4861e0461d73fd7715f406db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CF 9864 bytes

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