Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b17ba252b053f95…

MALICIOUS

PDF

42.7 KB Created: 2020-08-24 19:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14e4000f37ac8379079cdfdccacfcb4f SHA-1: 125505b6b088817e5407970f759660b1ce38e819 SHA-256: 7b17ba252b053f95bef96b1d9877c7a26bf37f4b8138e259e4a6943b3e7909b7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a 'cactus guide'. The ML classifier strongly indicates maliciousness.

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/pify?keyword=cactus+guide+arizona
    • http://vaniv.ktfhomes.com/uploads/1/3/1/4/131406153/a22299.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuxopikuxoxixu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9088/6299/files/mezosebibotapidowogudux.pdf
    • https://cdn.shopify.com/s/files/1/0435/6145/1681/files/parallel_lines_and_missing_angles_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/33848762189.pdf
    • https://cdn.shopify.com/s/files/1/0439/4627/9080/files/8431260365.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/pdf_of_candlestick_chart_pattern.pdf
    • https://cdn.shopify.com/s/files/1/0437/2594/7029/files/simplifying_exponential_expressions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0439/3179/5624/files/8221949130.pdf
    • https://cdn.shopify.com/s/files/1/0434/4096/3750/files/53134923710.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/figure_caption_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/6576/1176/files/52749678407.pdf
    • https://cdn.shopify.com/s/files/1/0453/6372/4443/files/aphthous_ulcers_patient_handout.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6e.bin
b445db48b2613fc63f3b2c82419a078dce6a3d36ed6291aecaa030c514ab82bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6E 5032 bytes
font_01_sfnt_off00007b95.bin
901fb73c0ff1b965d7450cc7bb14743b7b488218e9b8e5e563886625f7a39b8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B95 10284 bytes