Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5e551a3bb0456d1…

MALICIOUS

PDF

51.2 KB Created: 2020-08-04 19:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff564964db3bd5a5863067bfcded7d7e SHA-1: 92dc0bd9c12555234b2f7dc845658ce23d131739 SHA-256: e5e551a3bb0456d13320fc385f7f4137d3697fd097edd753571f56592b54a770
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'numeros primos y compuestos 6 primaria pdf' and a URL that appears to be a lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the presence of a link to known malicious infrastructure, and 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting a spam or phishing campaign. The primary IOC is the malicious redirector URL.

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=numeros+primos+y+compuestos+6+primaria+pdf
    • http://files.classicaltocontemporary.com/uploads/1/3/0/7/130738794/c47b6336ae.pdf
    • http://files.wilesmenschla.com/uploads/1/3/1/0/131070452/a1b909f656.pdf
    • http://files.noreencoupenpleinair.com/uploads/1/3/2/6/132682790/fujagakaxodi.pdf
    • http://files.owensfamilywellness.org/uploads/1/3/1/4/131452903/malugugoxagu.pdf
    • http://files.wamindaworkingstockdogs.net/uploads/1/3/1/8/131871501/zabepu-raboden-zimuduji.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/dijerudutu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/interview_questions_for_accountant_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/zofisig.pdf
    • https://cdn.shopify.com/s/files/1/0439/1898/3323/files/55463188826.pdf
    • https://cdn.shopify.com/s/files/1/0433/3862/9270/files/vonigurezinolifipufenuti.pdf
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/36290684592.pdf
    • https://cdn.shopify.com/s/files/1/0428/6555/7671/files/dell_optiplex_7010_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/fozisu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5296/6812/files/lejobi.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_off00007120.bin
674ee5cd87792f81c1bc2b7f8dd386dc4eb21e9a46afa89e3a723f00f971e2d6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7120 5496 bytes
font_01_sfnt_off000083c8.bin
0b7ef90998a7c37a903ba4f86d7c14fd47d954ccbe8f2fd6d04a30c0234f7a49
pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 10896 bytes
font_02_sfnt_off0000a790.bin
bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939
pdf-font-stream PDF embedded font (sfnt) at offset 0xA790 16312 bytes