Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca8da95d79c2a22…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 11:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c8aab734bfa324efbe4ca405124a68a SHA-1: c1ad55bb1fe326fc1c9152766d061d1e538eaf1d SHA-256: 2ca8da95d79c2a2259813f2dfa68db68cddf286ca4b82b6ae0fecf304651a678
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link farm. One of these links, 'https://ttraff.cc/wix?keyword=knowing+god+packer+pdf', is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL and numerous other links pointing to external resources, suggesting a coordinated effort to drive traffic to malicious sites. The presence of a malicious redirector URL is the primary indicator of malicious intent.

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/wix?keyword=knowing+god+packer+pdf
    • https://static.usrfiles.com/ugd/b8c837_711aa29604ee465bb31c31badcae9827.pdf
    • https://static.usrfiles.com/ugd/b8c837_463a20622dd04597870adc58658f5bcc.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb6fca7f18444a6a859001c0166b6698.pdf
    • https://static.usrfiles.com/ugd/b8c837_42c352870c6d464aa2ba5c4fa26692ff.pdf
    • https://cdn.shopify.com/s/files/1/0437/1428/1625/files/forovizopagegaxijopi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/20776350608.pdf
    • https://cdn.shopify.com/s/files/1/0431/5666/8573/files/59445054753.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/puratefupixosukuw.pdf
    • https://cdn.shopify.com/s/files/1/0440/3740/6870/files/84493959147.pdf
    • https://cdn.shopify.com/s/files/1/0427/8226/1415/files/fizzbuzz_python_recursion.pdf
    • https://cdn.shopify.com/s/files/1/0438/9679/9384/files/applications_of_mathematics_in_geology.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/62042090741.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5452/files/birimuwulugupesivexivadul.pdf
    • https://cdn.shopify.com/s/files/1/0432/6716/2276/files/46969554373.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/tuzoloferesipikepuned.pdf
    • https://cdn.shopify.com/s/files/1/0431/7036/5602/files/acls_guidelines_aha_2020.pdf
    • https://cdn.shopify.com/s/files/1/0437/6159/8616/files/dirivemajemedepadugu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8813/3787/files/zefurokugela.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_off000073b8.bin
bd06f0f15b5a368600b9b15e1f6f2e5ad28f359d7cd92cd2b405d1ea6157fa03
pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 5236 bytes
font_01_sfnt_off000085b1.bin
c2e3be56fbea337d65c8165e104486941dfa5d824503901c50f17b3ac625ce34
pdf-font-stream PDF embedded font (sfnt) at offset 0x85B1 10264 bytes