Malicious PDF — malware analysis report

Static analysis result for SHA-256 87deacd73e86eb83…

MALICIOUS

PDF

34.8 KB Created: 2020-08-14 11:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45c0061bd7ae313e39548400ce3e9974 SHA-1: e6aee298e6574ac5c4227cc54642019cc4e3ca3d SHA-256: 87deacd73e86eb83c4d48ab39f7120aba462851ab5c4150efb02e2f7dcbd0a5d
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=confessions+of+a+shopaholic+worksheet`. This URL is embedded within the document body, suggesting a social engineering lure. The document also contains a large number of external PDF links, many hosted on `cdn.shopify.com`, indicating a link farm. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.cc/pify?keyword=confessions+of+a+shopaholic+worksheet
    • http://files.snarkypaws.com/uploads/1/3/2/6/132695535/3faee7c42b.pdf
    • http://fekaxilu.mccoymultimediallc.com/uploads/1/3/0/7/130739573/vadabofew_sidanase.pdf
    • http://files.missmargueritewilson.com/uploads/1/3/1/3/131380870/wawidoteruxubiziko.pdf
    • http://files.leahkneipp.com/uploads/1/3/2/6/132696077/wokujivel-sewubax-wonesofixas-neged.pdf
    • http://files.rockyouthministry.com/uploads/1/3/1/3/131379663/6762612.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/85354210274.pdf
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/rukojebutitutuvavezofaxud.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/biblia_takatifu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/sefanux.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/24271906430.pdf
    • https://cdn.shopify.com/s/files/1/0428/5916/7900/files/cahier_journal.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1014/files/64083020891.pdf
    • https://cdn.shopify.com/s/files/1/0430/4066/9849/files/33166958305.pdf
    • https://cdn.shopify.com/s/files/1/0428/8577/5519/files/70152998764.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_off00004876.bin
1825ed062ae49ef9e9ccf396218f0035240e149063b83794291f5f653b8e9d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4876 5164 bytes
font_01_sfnt_off00005a13.bin
3b82c5a41977d69c654af29691ad2a9e3589bb108bbdbc4fda45d81f818b592f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A13 10208 bytes

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