Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f4efeeca999768e…

MALICIOUS

PDF

43.7 KB Created: 2020-08-30 11:28:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d80c8c4f3f92496a3f44f4cb96385884 SHA-1: 19c2401421eda0c32c1ab100b8c5f05a3b07c262 SHA-256: 9f4efeeca999768e6dd4655a7d5f4891ca73960abe29296e298cf86ea7a5ad62
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.com/wix?keyword=1955+good+housekeeping+good+wife+guide', points to known malicious redirector infrastructure. The presence of a link farm and a malicious redirector suggests an attempt to lure users to harmful sites, likely for phishing or malware delivery.

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=1955+good+housekeeping+good+wife+guide
    • https://static.usrfiles.com/ugd/8c0e65_7cd5e4da8b2d42aa9e4ec48ec8b48fff.pdf
    • https://static.usrfiles.com/ugd/2ac701_d27e151a6b014b1fb480b8ab1e65f7f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab496fbdc8f34ea7b0d3c922cdf9bdbc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4467c5b00ebe4e0292dafdbfc202cd1a.pdf
    • https://static.usrfiles.com/ugd/e4ff69_5b61d2cbd29f4a2e8c40097ff02b1b83.pdf
    • https://static.usrfiles.com/ugd/df4650_40145a60e1754ec4af13d1d7d1b5a430.pdf
    • https://cdn.shopify.com/s/files/1/0428/3806/5319/files/understanding_the_linux_kernel_latest_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/5631/7091/files/48693986059.pdf
    • https://static.usrfiles.com/ugd/b8c837_9624d14830c74476a1917027b3de8b7f.pdf
    • https://static.usrfiles.com/ugd/b8c837_906fbb18604e4936b0fe807f795e5f98.pdf
    • https://static.usrfiles.com/ugd/b8c837_f54f9318435f4cac88e1bd6d3ad48bfb.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_off00006d00.bin
c624c8c374fc0a9b697a9b30cc20bf5c6f2a7c1b13a181cbb0d5ba15875380cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D00 5360 bytes
font_01_sfnt_off00007f4f.bin
7fc48e5c74cfcefb1204aae59b5da935f3e5e14b84767ac7887d2d1284bdf43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4F 10192 bytes

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