Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21cac369f5a86e8…

MALICIOUS

PDF

59.0 KB Created: 2020-08-19 09:03:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87e2a1b9ad5e92df6b506e1064588e26 SHA-1: 85913151c2c86dd0dcfb0176ea5bf2ffabb691d0 SHA-256: a21cac369f5a86e811e049ba73787e138509f489c3d16e8a674288b6c1c419d7
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One critical heuristic firing indicates a link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure.

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.com/pify?keyword=bubble+bobble+memories+apk
    • http://files.the-green-school.org/uploads/1/3/2/7/132712373/2755378.pdf
    • http://files.kbassormt.ca/uploads/1/3/1/3/131381480/madosaside.pdf
    • http://files.hicsa.org/uploads/1/3/1/0/131071072/xogutefu-nesovevevini-kadelize-wijopoj.pdf
    • http://files.ballroom-blitz.com/uploads/1/3/1/4/131452867/luvefaxubog.pdf
    • http://files.shunsart.com/uploads/1/3/0/7/130775921/ab0820e8bec20.pdf
    • https://cdn.shopify.com/s/files/1/0429/7388/8671/files/viragumibowegerom.pdf
    • https://cdn.shopify.com/s/files/1/0464/1344/7336/files/tawuwovaleruwalavifatefik.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdf
    • https://cdn.shopify.com/s/files/1/0428/6890/0006/files/bemuwuruwezazox.pdf
    • https://cdn.shopify.com/s/files/1/0440/9815/8744/files/846466214.pdf
    • https://cdn.shopify.com/s/files/1/0428/7922/1927/files/mobutotuvunojedajifun.pdf
    • https://cdn.shopify.com/s/files/1/0434/5063/0296/files/wotosewatojifututebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5593/0783/files/7664683219.pdf
    • https://cdn.shopify.com/s/files/1/0438/2998/5430/files/gijobutimuzefozudotara.pdf
    • https://cdn.shopify.com/s/files/1/0427/6961/2966/files/gurren_lagann_episode_6_uncut.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006853.bin
83fc83a3b7a5ecb3d0c0d7234f66daa8cc2a2a0a95478dd68c0577bfe4cac381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6853 4912 bytes
font_01_sfnt_off000078f8.bin
5c0e874dd76beffd31bd4868d82f491b3cadead12aea739412578b7d5b5e4a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F8 8536 bytes
font_02_sfnt_off00008ff2.bin
db501b10b00b8086b381105629b83a2bc1b36d712182d9fd86f648fe49cf1748		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF2 15252 bytes
font_03_sfnt_off0000bf2a.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF2A 4324 bytes
font_04_sfnt_off0000cd2b.bin
2771d55b51ff65a7fb5333b85693b8a431ccd293351b0d422a219fa066fe951b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD2B 4596 bytes

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