Malicious PDF — malware analysis report

Static analysis result for SHA-256 e28b60292049d317…

MALICIOUS

PDF

73.0 KB Created: 2020-08-19 10:31:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3660cadc0d7e168f686794d065a6395 SHA-1: 5510e04cf1d4f4f1ae675641986377ba4ac6ef6c SHA-256: e28b60292049d317dd83a5311080c1debe1732f70eeab78fa504e7ff998b1abb
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, disguised with text that appears to be 'Samsung brand guidelines 2018 pdf'. The link leads to 'ttraff.cc', a known malicious redirector. Additionally, the PDF hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO manipulation tactic. 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=samsung+brand+guidelines+2018+pdf
    • http://dekafeg.gen12church.com/uploads/1/3/1/4/131438234/xorodumopukipu-ruxij-gilovipifu-wusatoli.pdf
    • https://cdn.shopify.com/s/files/1/0432/6332/8424/files/99741168265.pdf
    • https://cdn.shopify.com/s/files/1/0430/9132/9173/files/sinukoxowuga.pdf
    • https://cdn.shopify.com/s/files/1/0433/6612/1623/files/75202492065.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/coagulant_and_anticoagulant.pdf
    • https://cdn.shopify.com/s/files/1/0434/6786/6278/files/cdr_to_tiff_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9145/1303/files/letivesawovijakudesus.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/kuloguzu.pdf
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/68706885530.pdf
    • https://cdn.shopify.com/s/files/1/0437/6068/1111/files/78853587515.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21244882445.pdf
    • https://cdn.shopify.com/s/files/1/0436/8649/4361/files/15054422573.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/34254693915.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_off0000d605.bin
dca56e207e1b97b8e3d5b62d69daa798e49df98b7d3f95a5708571ca9fa30340
pdf-font-stream PDF embedded font (sfnt) at offset 0xD605 6124 bytes
font_01_sfnt_off0000eab5.bin
34cae7759fbdea1587e8ab0fe49121514782566c3c227d1c1571a11f173077de
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 14088 bytes