Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd72777e50413067…

MALICIOUS

PDF

38.1 KB Created: 2020-08-04 10:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 312e452196499f0362b373dc28d23a6a SHA-1: 5d9b602b17352019ce4b7153656acd4ca8a13982 SHA-256: cd72777e5041306757d7146e8a8bfd934e80000ca263c5c70ab2ff54f16b5221
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a critical redirector URL (https://ttraff.cc/pify?keyword=charles+correa+belapur+housing+pdf) which is indicative of a phishing or scam attempt. The document body, though heavily obfuscated, contains text related to 'Charles correa belapur housing pdf', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=charles+correa+belapur+housing+pdf
    • http://files.stitchanddestroy.com/uploads/1/3/1/6/131637273/pitexemevawudural.pdf
    • http://files.irondan.net/uploads/1/3/1/4/131453919/a99a4b96f6a2.pdf
    • http://files.samanthawyattphotography.com/uploads/1/3/2/6/132682607/bixemifad.pdf
    • http://files.organicpricezone.com/uploads/1/3/1/6/131637385/tezerurisexisab.pdf
    • https://cdn.shopify.com/s/files/1/0434/5951/0425/files/87194273706.pdf
    • https://cdn.shopify.com/s/files/1/0438/5934/5573/files/5hp_briggs_and_stratton.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/guvefiribusofivum.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/wurireruvudaxatekasij.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/riselenorokeforixazifib.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6010/files/womibeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/2994/4730/files/o_breve_catecismo_de_westminster.pdf
    • https://cdn.shopify.com/s/files/1/0434/6255/7856/files/zozesidaserarox.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/falanit.pdf
    • https://cdn.shopify.com/s/files/1/0432/5251/4971/files/loburawa.pdf
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/11239218903.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_off000057cb.bin
86849d826238c60b533b8b7f793580bc438b06d70331836a0e8bd42641b5afe1
pdf-font-stream PDF embedded font (sfnt) at offset 0x57CB 5464 bytes
font_01_sfnt_off00006a47.bin
dd607ee2e7b690b8b40adaff247de0d19f7ce75ea09cb44f81bce4a99b6c0b2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A47 9740 bytes