Malicious PDF — malware analysis report

Static analysis result for SHA-256 d663fe6b2a4e7213…

MALICIOUS

PDF

99.7 KB Created: 2020-08-24 12:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 855e8bb950851c365bd7c01e44e6520e SHA-1: beee2db1ccbc31c2a67cfab82418cb310a490a73 SHA-256: d663fe6b2a4e7213c76cade5d1c96ea7f68a59fbc10bde95a9357337ddba95e2
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=formule+calcul+salaire+net+en+brut+tunisie'. This indicates the document's primary purpose is to redirect the user to a potentially harmful site. Additionally, a PDF link farm heuristic suggests a large number of outbound links, common in SEO poisoning or spam campaigns. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent.

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=formule+calcul+salaire+net+en+brut+tunisie
    • http://wagefosi.higherlearninginc.com/uploads/1/3/1/4/131409090/dimukalinixutub-rositu-matefubuse-tesomadasin.pdf
    • http://files.mountainofwords.org/uploads/1/3/0/9/130969357/vudar_gujelekalurima_dejuwuvabip_tejalujam.pdf
    • http://files.spiralofcooperation.com/uploads/1/3/1/4/131407357/39595.pdf
    • http://files.natureexperiencetours.com/uploads/1/3/1/4/131406736/kusuzinivimemapa.pdf
    • http://jivelalas.neilchalmers.com/uploads/1/3/1/8/131857920/luwazawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/tisofarilamofenuwu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3653/9045/files/dexatuxag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/bvms_7._5_viewer.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/59652791603.pdf
    • https://cdn.shopify.com/s/files/1/0447/5063/5162/files/curious_researcher_8th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7391/files/54210795539.pdf
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/simple_cash_flow_excel_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/8180/8549/files/82139170479.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/nejinapexubineloze.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/ruzibebibowuzofaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/vapekof.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_off00012fb9.bin
4e266543e62a088d2b60a757dff7422944f91f1325aef33fc5bf67ca9a377c07
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB9 4924 bytes
font_01_sfnt_off00014050.bin
e321850b9aea4a05652cfe43289b8d30f760d1531b4abd3b789a0b11e677cac2
pdf-font-stream PDF embedded font (sfnt) at offset 0x14050 16776 bytes
font_02_sfnt_off0001713f.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x1713F 4324 bytes