Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52d02e7698652f1…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 13:46:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1107566a93c66b18b2480e67700eba51 SHA-1: 9078bbe4001b6d591168c73c25d74b55024ba9df SHA-256: d52d02e7698652f18d6a9086a135ce867fb98fb91f8f069e213217a8d93e00c5
152 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to lure victims to a compromised site. No scripts were extracted, but the presence of numerous external links suggests a content-farming or redirection attack.

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.com/wix?keyword=burger+king+new+port+richey+fl
    • https://static.usrfiles.com/ugd/b8c837_71bf347a23e549af87e1aa222d67113b.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb2c51e61864088a723f52a2f679481.pdf
    • https://static.usrfiles.com/ugd/cf79db_a0666c32d6e245c1800429ad6a6b8b10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/convert_nh_sang_word.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7472/files/3220501284.pdf
    • https://cdn.shopify.com/s/files/1/0440/0925/9158/files/edudel_date_sheet_2018_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/9725/1235/files/buxiteleto.pdf
    • https://cdn.shopify.com/s/files/1/0461/3180/6376/files/69341637725.pdf
    • https://static.usrfiles.com/ugd/a76634_fad08a28eac4476983aa9bd1ec544374.pdf
    • https://static.usrfiles.com/ugd/b8c837_cbafac0e7d174d3388260a72d41f770f.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_off00004b87.bin
db3c92b4ab3e2102f6e27cb0c51c040aa541135cac0732a26c7bcf03c52d5e33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B87 5196 bytes
font_01_sfnt_off00005d56.bin
bb59ba75de2c50e688385f5d022ab55013156ee2c9ddaf744a0d6f8031dc0d69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D56 10572 bytes

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