Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b5c4cfd019bab7…

MALICIOUS

PDF

49.0 KB Created: 2020-08-14 11:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94822ebe5541dd341301dda64e736e96 SHA-1: 63de0831ed3a92be696c73a44f0e828a5c97dc43 SHA-256: 57b5c4cfd019bab70dee8991cbd96f09e718a658ecee8f8a1f9b42f0f111cf0c
136 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a phishing or scam attempt. The document body, though heavily corrupted, contains text related to a 'free chess app' and a call to action, aligning with the 'SE_URGENCY_LURE' and 'SE_DOWNLOAD_BUTTON' heuristics. The primary malicious IOC is the redirector URL, which is used to funnel victims to further malicious content.

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.com/pify?keyword=free+chess+app+for+android+and+iphone
    • http://files.soglitudes.com/uploads/1/3/1/4/131483662/934fd22bd53afd5.pdf
    • http://teperuto.momsfreeminute.com/uploads/1/3/1/4/131437601/peduxegogomip-petavevawoturov.pdf
    • http://files.alabamaheritage.com/uploads/1/3/0/8/130874495/f2cae61db.pdf
    • http://votave.monbaptistassociation.com/uploads/1/3/0/9/130969204/2719365.pdf
    • http://files.aliceannephotography.com/uploads/1/3/1/3/131379447/xisejexopore.pdf
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/80678440506.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/84888642829.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/tinkers_construct_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6230/files/absorcion_de_calcio.pdf
    • https://cdn.shopify.com/s/files/1/0432/5136/8104/files/77374969862.pdf
    • https://cdn.shopify.com/s/files/1/0437/5547/1006/files/33417633271.pdf
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/27537036732.pdf
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/puxemovixejusiminuvomiki.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/astrology_houses.pdf
    • https://cdn.shopify.com/s/files/1/0440/1935/1710/files/heterogeneous_catalysis_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/7062/6723/files/gemagabuzuwivonerajox.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/mosabuxidarunasopepala.pdf
    • https://cdn.shopify.com/s/files/1/0440/5064/5157/files/jovefuxajogulapoxofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4217/6150/files/7930301168.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_off00008077.bin
0c178c7a3b00255cbe3985e0393404a3474a6148a11f8d8da12fc37c22903346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8077 5168 bytes
font_01_sfnt_off00009203.bin
dc7b6f1a36e108ff78cccc094f04ef6c476426920d9bb7b1321fa6100523f112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9203 10748 bytes

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