Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cdc2c032f2d779…

MALICIOUS

PDF

45.9 KB Created: 2020-08-10 21:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88fd3c3d2ac889d28dc9913600aa1342 SHA-1: 7469819e76e8166999b2bb1b736f755f7ab4625c SHA-256: 30cdc2c032f2d779c87b05b0b5048e0376f69376bc173d1a925a201abccc84ce
120 Risk Score

Malware Insights

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

The PDF file contains a lure related to '10th class english book answers pdf' and embeds numerous links. One of these links, https://ttraff.ru/pify?keyword=10th+class+english+book+answers+pdf, is identified as a malicious redirector. The file also contains a large number of SEO-optimized PDF links, many pointing to cdn.shopify.com, suggesting a link farm strategy to distribute malicious content.

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=10th+class+english+book+answers+pdf
    • http://files.theschoolhouseeclc.com/uploads/1/3/0/8/130813317/7581302.pdf
    • http://kadopunur.northernumpires.com/uploads/1/3/2/6/132695615/8419957.pdf
    • http://files.thoughtfullyshelby.com/uploads/1/3/2/6/132681456/7128611.pdf
    • http://files.brunswickbands.org/uploads/1/3/1/3/131380308/wimamuvofajit_sedasik_tufopakuti_kalafojugazeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/barefota.pdf
    • https://cdn.shopify.com/s/files/1/0435/0722/0635/files/zuxeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/1565/0980/files/66225896583.pdf
    • https://cdn.shopify.com/s/files/1/0433/3872/7589/files/kapubovafapisino.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/wasimebijadox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0097/8853/files/marketing_project_report_on_sales_promotion.pdf
    • https://cdn.shopify.com/s/files/1/0429/7474/0639/files/83101805763.pdf
    • https://cdn.shopify.com/s/files/1/0433/9243/4343/files/82051954231.pdf
    • https://cdn.shopify.com/s/files/1/0429/6297/6921/files/fofufebiduxamo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7391/9393/files/asfixia_perinatal.pdf
    • https://cdn.shopify.com/s/files/1/0429/5517/8150/files/13210863745.pdf
    • https://cdn.shopify.com/s/files/1/0437/6245/0586/files/bank_exam_preparation_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/2515/4716/files/menanebumapodigurakas.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_off00006028.bin
881f53f6221f33d9f6692b13e563c7c7c83439b793bd2e706ebd111f67571dfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6028 5812 bytes
font_01_sfnt_off000073ef.bin
dba2df17f775ec4228bc512dd6c11c9a78243403b22757bd5078f4b11f0e8d7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x73EF 10180 bytes
font_02_sfnt_off000096dc.bin
df4542a37b5fbad568d94063c0ef1b29d0adefcc4b7bf1b24886ea2487c84900
pdf-font-stream PDF embedded font (sfnt) at offset 0x96DC 5424 bytes