Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bba6eba093271b1…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 17:19:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6c9c77945786ded56ce68ee8e36145b SHA-1: 0a6dbdc4727b05ad37117650051800bb5f4a6f1b SHA-256: 9bba6eba093271b119b81678b670cd765fd8755e133e7d39bc388fa6b18ac3e5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=the+basics+of+social+research+7th+ed'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of malicious intent.

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.cc/wix?keyword=the+basics+of+social+research+7th+ed
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/customary_units_of_measurement.pdf
    • https://cdn.shopify.com/s/files/1/0438/0252/5856/files/brche_addieren_und_subtrahieren_klasse_6.pdf
    • https://cdn.shopify.com/s/files/1/0436/6493/3014/files/30140838926.pdf
    • https://cdn.shopify.com/s/files/1/0438/4774/5698/files/broadcom_bcm43142_bgn_wifi_adapter_driver.pdf
    • https://static.usrfiles.com/ugd/6d59ab_bacc76b8157b450ea2da5604d325fe60.pdf
    • https://static.usrfiles.com/ugd/cfa91a_c79fbf7ae4b84947ae7467cc13aef838.pdf
    • https://static.usrfiles.com/ugd/e3c460_95151681e3cf41c0bebc71222c8a28e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d8d984de324ca39cffe21bbbbdfa34.pdf
    • https://static.usrfiles.com/ugd/b8c837_fa3f1faec73e480c94bc9a41c8222df8.pdf
    • https://static.usrfiles.com/ugd/b8c837_eeb5fbc71b5f41eba42156967372d0cf.pdf
    • https://static.usrfiles.com/ugd/63d3ad_e3a853cd2f094d6bae51b72a15c2ea3b.pdf
    • https://static.usrfiles.com/ugd/b8c837_fcc17a7272924eab8106535be1aeb6b5.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_off00005a91.bin
a33660b100e03c31a67d365ff18daa1262e4b23e32a3bd00e225ce64f87342f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A91 5280 bytes
font_01_sfnt_off00006c74.bin
9f661b0c11a4dd7cc226da9090b72ad6ecfe2a7b292896aeff955a78137963b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 10408 bytes

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