Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c55c75e6563c5ae…

MALICIOUS

PDF

55.7 KB Created: 2020-08-14 23:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab1170492fb9c23c64177b80826a7ad SHA-1: 37a4fe7b523037bca3c9485e36455e87ff84bfb1 SHA-256: 1c55c75e6563c5ae3f625021bfdf76bd882a3d4786c54528914647777096bea3
128 Risk Score

Malware Insights

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

The PDF file contains a malicious redirector link disguised as a notification about an Android TV box purchase. It also functions as a link farm, directing users to numerous other PDF files, many hosted on Shopify. The heuristic 'SE_INVOICE_LURE' further suggests a deceptive intent, likely to trick users into clicking the malicious URL. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=t%25C6%25B0+v%25E1%25BA%25A5n+mua+android+tv+box+tinhte
    • http://files.afterdivorce.net/uploads/1/3/0/8/130873820/koresunexepori-xezara-pidutonodak-jakuniteta.pdf
    • http://ridixudi.nawicsemn.org/uploads/1/3/1/0/131069934/rejazamofemiz-xerixedibom-zuvodu-babizibemu.pdf
    • http://gijapafa.tomslawnandtreecare.com/uploads/1/3/1/8/131857101/womobunet-nezudagusiloni-tapenigexiwi-nafubefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/phonics_beginning_sounds_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/47585907032.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/alter_ego_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/5802/7928/files/jinodajajafenufiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5400/files/felobe.pdf
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/lukikowuwipoxud.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/45986866275.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/fiwejigonikokenoriz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5573/files/93569570657.pdf
    • https://cdn.shopify.com/s/files/1/0431/8121/1810/files/web_design_course_download.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_off00007006.bin
147762c747d12414e53fdfdbfd55c4ad1835293af344fb14ae1edf4c2b534127
pdf-font-stream PDF embedded font (sfnt) at offset 0x7006 5468 bytes
font_01_sfnt_off000081cf.bin
1cd5e1df7bb9d77d40e07ed067a4085932c23f240a8835066d4fe76e80e9cd67
pdf-font-stream PDF embedded font (sfnt) at offset 0x81CF 17660 bytes
font_02_sfnt_off0000ad1d.bin
6bf5b4ee377c42ea4f757f78d6631a7c5bd8fa123573b2ee24a318ccf26b4e2c
pdf-font-stream PDF embedded font (sfnt) at offset 0xAD1D 10152 bytes