Malicious PDF — malware analysis report

Static analysis result for SHA-256 d558bb67d8c49613…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 01:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c3c2172c2e831ac345a01fa49ee0235 SHA-1: 5b6cd1a1de8e89feaf902b9aebdc0e8b6e232875 SHA-256: d558bb67d8c49613f581a501417bb024dd076e3e92d00232180cea30aaa8ee9f
168 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious redirector. The document body and heuristics indicate a lure for remote support tools like TeamViewer, suggesting an attempt to gain unauthorized access. The presence of a malicious redirector URL and the remote support lure strongly indicate a malicious intent to trick the user into downloading potentially harmful software.

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.cc/pify?keyword=teamviewer+apk++uptodown
    • http://files.just-a-fan.com/uploads/1/3/1/4/131483955/422160dfd6798a.pdf
    • http://files.sixeightapparel.com/uploads/1/3/1/3/131382274/legowafepevajona.pdf
    • http://files.allazoleadership.com/uploads/1/3/1/0/131070398/kejom.pdf
    • http://vojerumew.donnaeatonsdesigns.com/uploads/1/3/0/8/130813395/gigalabagobo-tijolib-razewikofoxef-maselumuw.pdf
    • http://files.smartnetworksco.com/uploads/1/3/0/7/130776276/vetej.pdf
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/string_to_long_java.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/xefed.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9558/files/78633499384.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3801/files/mivifejebakufibaviditix.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/76994496573.pdf
    • https://cdn.shopify.com/s/files/1/0434/8212/0357/files/99905796059.pdf
    • https://cdn.shopify.com/s/files/1/0437/0392/6952/files/vopekimalitepagu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/26499271028.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/cursive_writing_practice_sheets_for_adults.pdf
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/24532742199.pdf
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/69571497416.pdf
    • https://cdn.shopify.com/s/files/1/0437/6929/9098/files/50213179459.pdf
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/sifusatoxufoxu.pdf
    • https://cdn.shopify.com/s/files/1/0438/8909/8907/files/91637639312.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_off00006641.bin
8a06999cd0918e716ef5f03a5b796dfa6bf8c6e66811f5bfe3ede1fedee95eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6641 5060 bytes
font_01_sfnt_off00007777.bin
fbcba8ed822b925a5aabc79fdc35cbad7290f1e89aa716f5eec447a8a0b45eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7777 13836 bytes

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