Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ef4a949d0e98cc5…

MALICIOUS

PDF

56.5 KB Created: 2020-08-29 15:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5480eec29ecac7d75e9c19ecc3a049d SHA-1: 9728ec39ebe29664241e70c47d3dce99dc9262e2 SHA-256: 6ef4a949d0e98cc5ff18cf433ff7b98833dcaf391966adf705cbc6b8239efdb3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely the primary malicious objective. The document body, though partially corrupted, contains the same text as the malicious URL's keyword parameter, indicating a direct attempt to drive traffic to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=que+son+las+manualidades+y+artesanias
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3842/5766/files/tenilitabax.pdf
    • https://cdn.shopify.com/s/files/1/0437/3004/3041/files/sasuke_and_itachi_vs_kabuto_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/3756/4839/files/foxidamova.pdf
    • https://cdn.shopify.com/s/files/1/0431/5286/7494/files/7425420585.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/nimup.pdf
    • https://cdn.shopify.com/s/files/1/0440/8147/9832/files/ncert_class_11_chemistry_periodic_table.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/12649699884.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4440/files/38366770861.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23929268289.pdf
    • https://cdn.shopify.com/s/files/1/0427/4490/5884/files/hyperdimension_neptunia_re_birth1_phantom_wing.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc5c1ca9c9a94096a5d4d6580337202a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c79df8530f58410ab29620deeff8cf9f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bf75445de134018b01cbe6209c793e6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc86b908dc794c61b1f140f041a99278.pdf
    • https://static.usrfiles.com/ugd/b8c837_d960f1f71f894325888f121507b199c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_96eedea859fb4cba9c5132bc38469d66.pdf
    • https://static.usrfiles.com/ugd/b8c837_a21f28d8f01041dbaa3e5affb1b8db98.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fb9c67ba5c34197bdd12f7c1116f610.pdf
    • https://static.usrfiles.com/ugd/b8c837_c98c319dd3274486bdf28506ffc0fbdc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d0b5dd3e81324f639bc98ab7517b6820.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009b6f.bin
5572eb325f3b34ee45a36b20d7b64a196759d8b749e707a8a577fe122c4f0228		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B6F 5132 bytes
font_01_sfnt_off0000acd0.bin
732c209b54ff7d9f50b08176bff1a6775c8de44fbcb964c855a3c0812a75dfbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACD0 11980 bytes

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