Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2df1a044d33131…

MALICIOUS

PDF

42.3 KB Created: 2020-08-18 17:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0230710cd6427f3214bb25f2baf687e1 SHA-1: 2deb44de480317a9fcda4fc9cb3fa309329c343a SHA-256: 2e2df1a044d331319425afa6415c081ab7d043a60a3a1786a280efd0fc4c7ed3
150 Risk Score

Malware Insights

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

The PDF was flagged for containing a malicious redirector link and a large number of external links, suggesting a link farm for malicious redirection. The ML classifier also strongly indicated maliciousness. The embedded document body contains the primary malicious URL, which is likely used to lure victims into a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=tema+chelsea+xiaomi
    • http://files.pljconstructioninc.com/uploads/1/3/1/4/131453247/sufakoxok.pdf
    • https://cdn.shopify.com/s/files/1/0438/3126/3394/files/6572006046.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/how_to_mod_discord.pdf
    • https://cdn.shopify.com/s/files/1/0437/6271/2734/files/92691328675.pdf
    • https://cdn.shopify.com/s/files/1/0427/4556/1254/files/vojuroxasuvorevow.pdf
    • https://cdn.shopify.com/s/files/1/0431/1675/7153/files/kipina.pdf
    • https://cdn.shopify.com/s/files/1/0432/0693/4688/files/difizesigomudorisuzonigeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/9774/2750/files/jimalenolulizezoberutile.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/jaragoxijapugaxonanunegut.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/lomexujobidubaketorox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/lujowojejomimefo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4078/5062/files/82607038390.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052a4.bin
6a90c20217fc600934446cb70206c3f580a1ec7f4b5aeeca905a84a2c11c3784		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A4 4960 bytes
font_01_sfnt_off0000636b.bin
3924cfdd4a74b478b62557254c231595fe8f9d771b44ab12782909c88d3c9463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x636B 10324 bytes
font_02_sfnt_off000086ed.bin
9c47a8ecf7103172530608de19fa11afb8a035ab51042e9cb8c6809f09ebb189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86ED 16344 bytes

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