Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aae808e15f9446a…

MALICIOUS

PDF

42.9 KB Created: 2020-07-24 10:29:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6053d80181eefaeaaf19ce91361a5ed2 SHA-1: 4eb292729b9805c0835cf54eeb6cc4bb33837174 SHA-256: 4aae808e15f9446a45bc44fbddcd138050e93022c313c2bf8e69637847726764
128 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, including a critical link to a known malicious redirector at 'ttraff.cc'. The document body, though heavily obfuscated, suggests a lure related to 'confirmation invitations templates'. The presence of numerous PDF links, many hosted on cdn.shopify.com, indicates a link farm strategy to obscure the final malicious destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly suggests the intent is to redirect users to harmful content.

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.cc/pify?keyword=confirmation+invitations+templates
    • http://files.ps173q.com/uploads/1/3/0/8/130813648/a519fa94d77e3.pdf
    • http://files.brittanycrossman.com/uploads/1/3/1/3/131379899/8798769.pdf
    • http://files.mybowerstudio.com/uploads/1/3/0/7/130776100/waxugo-vowuzixevi-sedunon.pdf
    • http://files.brittanycrossman.com/uploads/1/3/1/3/131379899/
    • https://cdn.shopify.com/s/files/1/0428/6126/5062/files/sejuzipifinodapikegupof.pdf
    • https://cdn.shopify.com/s/files/1/0432/0801/6027/files/77140583715.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9755/files/39253953837.pdf
    • https://cdn.shopify.com/s/files/1/0435/6050/1407/files/11992745392.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7148/files/pepuzaxalom.pdf
    • https://cdn.shopify.com/s/files/1/0429/6913/7305/files/6282915966.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/51829425379.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/93669971092.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/56210768492.pdf
    • https://cdn.shopify.com/s/files/1/0434/7228/9944/files/187145670.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/tofidebemetusaren.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42262915950.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_off00006c82.bin
c6c8b13d1c166fb7bfd1b2746bc9bed25a68e90e8592a5fb0f968a17bc43691c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 4920 bytes
font_01_sfnt_off00007d1e.bin
bc68c570fac4909ec0b105cf4b3caa3930d505467eaef505556d0ab26c4ea368
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1E 9796 bytes