Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad7a75f6b776dcb…

MALICIOUS

PDF

43.9 KB Created: 2020-08-30 08:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40a09e0f9c89cbd847a240bfe458c4ae SHA-1: 15aa8ba3a8b8ac2d4911cfd0ecf9598407afee48 SHA-256: 7ad7a75f6b776dcb0629151c7c2f0ef743cdf2ee8eaacdd39e355cedc5b025a8
120 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Scrabble junior instructions'. The presence of a malicious redirector indicates an attempt to lead the user to a harmful site, likely for further exploitation or credential harvesting. No scripts were extracted, and the PDF structure itself did not reveal specific exploit techniques beyond the malicious link.

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/wix?keyword=scrabble+junior+instructions
    • https://static.usrfiles.com/ugd/c0b427_0931a4d6a3014d74ba7eda3bf09d19c5.pdf
    • https://static.usrfiles.com/ugd/3e0cb9_e20f45689b12437897a6480d8b75f1a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_46727d6a9e3a44e880657e6f3428764c.pdf
    • https://static.usrfiles.com/ugd/9e41f0_ce5ad166cbd34025b8742c1903969ed2.pdf
    • https://static.usrfiles.com/ugd/ab059d_87f4d76b8b6c4777b6a0498083c39577.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/kugepejunifon.pdf
    • https://cdn.shopify.com/s/files/1/0438/7271/4920/files/lowes_kerrville_tx.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8746/files/pesolal.pdf
    • https://cdn.shopify.com/s/files/1/0432/7804/1244/files/lujetasikakito.pdf
    • https://cdn.shopify.com/s/files/1/0459/9906/3199/files/82957545324.pdf
    • https://cdn.shopify.com/s/files/1/0440/7646/6328/files/meningite_bacteriana_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jikoleluvotejagumali.pdf
    • https://cdn.shopify.com/s/files/1/0435/2763/5096/files/vobeluse.pdf
    • https://cdn.shopify.com/s/files/1/0427/9985/7823/files/4752718520.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_off00005f96.bin
f4f52493739e02a3980bc4b265715bde0287962087a56354aeb279302b177d9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F96 4996 bytes
font_01_sfnt_off00007091.bin
1778668356cca4c8831ce236d9b0895d72fd6d0bf5b068542c7fde39df1b9bf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7091 10668 bytes
font_02_sfnt_off00009505.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9505 4324 bytes

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