Malicious PDF — malware analysis report

Static analysis result for SHA-256 557c7fcdf574b360…

MALICIOUS

PDF

44.8 KB Created: 2020-09-19 02:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c32684eeb2d00c8450e924a9aa543a86 SHA-1: a8aa01c155f19815e461588aac07b50766fa5897 SHA-256: 557c7fcdf574b36037cae3ecb50b22b4ad82d0642cb1c45f170bfb5ba213fc48
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.me', which is associated with malware distribution. Additionally, it exhibits a PDF link farm heuristic, with numerous links to PDFs hosted on Shopify. The document body, though partially corrupted, contains the phrase 'one click root apk free' and the malicious URL, suggesting a lure for downloading potentially harmful Android applications. The presence of a visual download button lure further supports this malicious intent.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=one+click+root+apk+free
    • https://4614d71f-0d3a-4cb0-be
    • https://cdn.shopify.com/s/files/1/0434/7671/3637/files/87630007270.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/aphex_twin_selected_ambient_works.pdf
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/gawidivesaduw.pdf
    • https://425be26a-ba26-4206-86ef-3c9e2578a7e5.filesusr.com/ugd/724bd4_bd3c8114e0db42e89e957a12e77e72ad.pdf?index=true
    • https://66d4f5be-eaaf-47a3-8ac0-ebe1f7b5b10f.filesusr.com/ugd/b2ba6b_f9f95fbf09ef4e6785d1ee2bd2796c71.pdf?index=true
    • https://ddee63c6-4783-4578-ade4-d04d7eadc135.filesusr.com/ugd/8ba634_2fa1222969274cadaec5eb92cecaddf2.pdf?index=true
    • https://2f9d2530-53da-4450-8d62-ccebc3a2fba4.filesusr.com/ugd/ca32a8_2e72aa0215074db2bb731f98ef2622b1.pdf?index=true
    • https://2c2e7223-f827-4482-b948-578b250a43f7.filesusr.com/ugd/c345b0_f195dc2a8f4842168d8ccef7e1f6fe95.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0430/8179/3698/files/zasojapip.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/sudubasudurinotapozu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6578/files/ark_survival_evolved_android_apk.pdf
    • https://0ed676d9-1018-4714-bbfa-6e2f9eaee368.filesusr.com/ugd/c2bf0a_0fd63746038340439d9c20a9edbd2593.pdf?index=true
    • https://4d3e75bb-65f3-4d75-b124-40fb5ed5a2e2.filesusr.com/ugd/3225da_69b0904850ce4e8b8bae545c2e88bb8c.pdf?index=true
    • https://275da171-77f6-45d9-b1a4-a75d4d593647.filesusr.com/ugd/1479de_0db1b35491f941d2b852c7efc5f0b3ec.pdf?index=true
    • https://4614d71f-0d3a-4cb0-be47-fa8ddc1351a9.filesusr.com/ugd/1da05d_5da683867bd84cf5a222dc38349755d7.pdf?index=true
    • 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_off0000682a.bin
43e62f3a9cb21d020119e6827e2f9a2e2c3fae47bb0db1cb22478b4788fe1e79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682A 4920 bytes
font_01_sfnt_off000078f2.bin
7d52a69efacf94308061ddcc7f5e4480d44ba60ac9b19c81a3efa62dad374059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78F2 2188 bytes
font_02_sfnt_off000082d4.bin
e248a1f490096d77de299d077e45046522e258fb566d8eff73bc1080b3a36af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D4 10372 bytes

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