Malicious PDF — malware analysis report

Static analysis result for SHA-256 820a5d1a1b5e17e7…

MALICIOUS

PDF

47.0 KB Created: 2020-08-24 17:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b74675fc2c349471626df7f6f70988c6 SHA-1: e9e3636205049be6696e711167c5fe8267d64915 SHA-256: 820a5d1a1b5e17e7084e1f07096f2d68c4c94220c58b04fce24f67debea7e55c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link and a large number of external links, suggesting a link farm or SEO poisoning attempt. The presence of a 'download button' lure further supports a malicious intent. The primary malicious URL identified is https://ttraff.ru/pify?keyword=game+by+utorrent+or+bittorrent, which redirects to a PDF hosted on Shopify. The document body contains garbled text but includes the malicious URL and a benign-looking Shopify PDF URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=game+by+utorrent+or+bittorrent
    • http://files.lanagates.com/uploads/1/3/0/7/130775537/wijipodi_towebexujaj.pdf
    • http://files.davidsonhc.com/uploads/1/3/0/7/130776327/fepisasat.pdf
    • https://cdn.shopify.com/s/files/1/0437/4780/3287/files/nomivamikeledikexuruta.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4754/files/ffxiv_blood_pepper.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/50758747255.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/definisi_alkalinitas.pdf
    • https://cdn.shopify.com/s/files/1/0435/2730/7416/files/lp_meningoencephalitis_tb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8789/6480/files/alita_battle_angel_movie_counter.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9434/files/wosuregosovikuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1968/1437/files/84680191256.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/nitixixidozeposijovafarat.pdf
    • https://cdn.shopify.com/s/files/1/0427/9857/9879/files/tuxemopupumukogenu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/59752192910.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36920421444.pdf
    • https://cdn.shopify.com/s/files/1/0428/0749/2775/files/advanced_trumpet_solos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5542/4423/files/belajar_excel_pemula.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_off00007b24.bin
e2ea32f50fca1fe9c96a9e1b69de26888b281520f6480275432ce2e17adb3f7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 4892 bytes
font_01_sfnt_off00008bbd.bin
02209e12992bce0d9ba9f51fe7fa35884f2d404dcadf75650f0cb637ca609c9d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BBD 10268 bytes