Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9afe2cddf0df8a…

MALICIOUS

PDF

47.6 KB Created: 2020-08-22 20:25:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fbf0c2f935b9357cb8daa9380dc6563 SHA-1: d4858097430613d0c08f8830a4d08fa15401b392 SHA-256: 6e9afe2cddf0df8a9f7c746332d308eb7afbaacf399e5779f62ceacf23df6052
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'baby shower card template word'. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to drive traffic to malicious sites.

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=baby+shower+card+template+word
    • http://mogudid.robertlloydartny.com/uploads/1/3/0/7/130739564/tisusoru_vuvifapinirep_relamajigewo_wunuxikasanidub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/1796/8543/files/60922985512.pdf
    • https://cdn.shopify.com/s/files/1/0466/6631/7989/files/27941518800.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/gedaxuronepakuduxunimip.pdf
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/mewitogevezukamiza.pdf
    • https://cdn.shopify.com/s/files/1/0436/5844/4958/files/23465397639.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/balisong_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0431/5119/6315/files/toteranotebiboj.pdf
    • https://cdn.shopify.com/s/files/1/0435/6567/8755/files/wisexesupokipebikut.pdf
    • https://cdn.shopify.com/s/files/1/0431/6515/5489/files/93502887583.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/19950124047.pdf
    • https://cdn.shopify.com/s/files/1/0434/6295/1074/files/dasuzebazowufukulozikemeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/sheetalnath_jain_temple_kolkata.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_off00007b98.bin
676fb5f0d5aac069a1cd1f6d32c9371455cfe3c15da3203b2173ebd2dffd39a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B98 5696 bytes
font_01_sfnt_off00008ede.bin
2ccfca593c6764884d65066326010e564e9cda66050ae93aceff7b6753a27fb9
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EDE 10308 bytes