Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5952bd572929884…

MALICIOUS

PDF

39.4 KB Created: 2020-08-16 19:44:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae83e533d4dd68775054b341b2011e4d SHA-1: b4ca58f304f71e27ee4692d753d16fbf1e904409 SHA-256: c5952bd572929884c7907357fe4aea0d8859b509fb5da237f792ba6fe6af6136
152 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/pify?keyword=printable+bridal+shower+games+pdf`. This URL is likely used to redirect users to a malicious site. The document also contains a PDF link farm, with many links pointing to Shopify domains, but the primary redirector is the most concerning. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=printable+bridal+shower+games+pdf
    • http://files.kittskreations.com/uploads/1/3/1/4/131483147/xivovabinoxodub_wobijevujalibul_dodazamifizevat_rirevuwo.pdf
    • http://sajab.ndsubisonrobotics.org/uploads/1/3/1/6/131606111/714925.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/list_of_auditors_in_chennai.pdf
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/21749040662.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/16392487145.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/nascar_diecast_price_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0657/files/ccis_philadelphia_application.pdf
    • https://cdn.shopify.com/s/files/1/0437/2496/3990/files/medical_imaging_signals_and_systems.pdf
    • https://cdn.shopify.com/s/files/1/0429/0514/1411/files/9990018343.pdf
    • https://cdn.shopify.com/s/files/1/0428/9229/6358/files/51176655174.pdf
    • https://cdn.shopify.com/s/files/1/0438/3670/2870/files/panipinosijawogorojinidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/levenelepuvimekewi.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_off00005b58.bin
136a44bf5e35bc4df1a6d67ffb609ea434853bdc087363415918bfcbaac83ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B58 5688 bytes
font_01_sfnt_off00006e8b.bin
1307ed0441d023bccb13fe7edf3b058324fc159aaa1123013287d6f194ceb7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E8B 10060 bytes

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