Malicious PDF — malware analysis report

Static analysis result for SHA-256 24dde2c4dd79570e…

MALICIOUS

PDF

40.5 KB Created: 2020-08-10 04:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 231d9819ecb709f87a1eb45540742e55 SHA-1: 2fcd6edc7110ca96274db5e87b87ac89a6380ca5 SHA-256: 24dde2c4dd79570e04b6e7d8865d12b1c84e235aadb7373d0f1dd008694f3e5d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though partially corrupted, includes the same URL and a list of other URLs, many hosted on Shopify, suggesting a link farm or redirection strategy. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is a malicious redirector.

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=definition+of+social+studies+by+different+scholars+pdf
    • http://files.ashtangayoganorthampton.com/uploads/1/3/0/7/130740191/gefeforazudesof.pdf
    • http://rugedigo.lonestarcarpetcare.com/uploads/1/3/0/7/130775350/xewog.pdf
    • http://files.fumcmon.org/uploads/1/3/1/3/131383743/665414.pdf
    • https://cdn.shopify.com/s/files/1/0440/1148/7397/files/jumulupuverutope.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/46861716207.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/54058996767.pdf
    • https://cdn.shopify.com/s/files/1/0432/4406/0839/files/cash_flow_forecast_example.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/puneg.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/43112765309.pdf
    • https://cdn.shopify.com/s/files/1/0434/1451/9973/files/79029975293.pdf
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/63418819604.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/races_of_faerun_3._5.pdf
    • https://cdn.shopify.com/s/files/1/0432/0962/1664/files/centone_di_sonate_paganini.pdf
    • https://cdn.shopify.com/s/files/1/0428/6880/1702/files/hollywood_hindi_mkv.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9173/files/gidadobareza.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_off00006107.bin
caa6595908dd07f1d9194cbf0fe80b8ef61d61e648226f668c20b4c6e1270761
pdf-font-stream PDF embedded font (sfnt) at offset 0x6107 5484 bytes
font_01_sfnt_off000073ac.bin
72204a5eef85cf778fce6238d78b013fd798264561cb24dd2373056298c74835
pdf-font-stream PDF embedded font (sfnt) at offset 0x73AC 9756 bytes