Malicious PDF — malware analysis report

Static analysis result for SHA-256 258a4b20d44bf4b0…

MALICIOUS

PDF

37.1 KB Created: 2020-08-31 17:04:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4ba1ae3ab9f07aad02585ee409243a10 SHA-1: f3d1772c6ecf4f6343226a3fb0c8345152a6c08e SHA-256: 258a4b20d44bf4b0f9ed85b5f315e4845c67d3cf535712c1f5c87295da5edd6e
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.cc/wix?keyword=3d+max+portable+free'. This suggests a social engineering attack aiming to trick users into downloading potentially harmful content or visiting malicious websites. The presence of a link farm further supports this, indicating an attempt to broaden the reach of the malicious lure.

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/wix?keyword=3d+max+portable+free
    • https://static.usrfiles.com/ugd/e78b77_989cd534dbfa4ebc9593a227918f9c1c.pdf
    • https://static.usrfiles.com/ugd/83f04e_4c7b0f81f56c4463b72c3a7d16a73949.pdf
    • https://static.usrfiles.com/ugd/3ce946_46b5c31d37484093a5941bb1a84f3ed6.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_dffc51f0090a4d189f5fd7ae75193c59.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fd7f8ff25d8455e83d95834c6718109.pdf
    • https://cdn.shopify.com/s/files/1/0431/6905/4886/files/datacamp_cheat_sheet_sql.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/pukinemusijovix.pdf
    • https://cdn.shopify.com/s/files/1/0437/2443/9704/files/xanakevegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/41500177160.pdf
    • https://cdn.shopify.com/s/files/1/0447/8110/9405/files/10551129491.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8455/files/xaleg.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_off00005526.bin
31e008ceaddb31d6510e5eb5511b2d52cd5be859cb0f8b3eb4efa7f674e63ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5526 5284 bytes
font_01_sfnt_off00006706.bin
7e1b1ade54fb7b2796a94fbe69caff477f2062aa8497da62abc9d8531dc0fe2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6706 9720 bytes

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