Malicious PDF — malware analysis report

Static analysis result for SHA-256 acccdcaa13c50761…

MALICIOUS

PDF

42.6 KB Created: 2020-08-31 15:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7106ce9de65f1fb9478c29af363ee3 SHA-1: dbc90878d752168084ee005a53960a8d403266b9 SHA-256: acccdcaa13c50761134307769d9324d3202f47140eda03d0f1f8e7e591c2ddd9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1200 Hardware Add-in System T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/wix?keyword=rohit+name+ringtone+song', which likely serves as a gateway to further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=rohit+name+ringtone+song
    • https://static.usrfiles.com/ugd/b8c837_03eac66e30104d518342abf41c340fb7.pdf
    • https://static.usrfiles.com/ugd/a2ebd8_58b9394f7a69455390672d636e6f6f2e.pdf
    • https://static.usrfiles.com/ugd/837d34_cd16623b657e446e8883134ac3e98fae.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/18925377403.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8342/files/shrek_3_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0430/7858/2439/files/30979943250.pdf
    • https://cdn.shopify.com/s/files/1/0437/8699/3816/files/logekadad.pdf
    • https://cdn.shopify.com/s/files/1/0448/5827/8050/files/ahsanul_bayan_english.pdf
    • https://static.usrfiles.com/ugd/b88e3d_09ed5ea0c9654fa4a7d8a38459e0141f.pdf
    • https://static.usrfiles.com/ugd/724bd4_0695257b806e4857a8ee27256beb39f0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b207ad7ef46945b7889860c5efc70661.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/40143057491.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/lubogudegukibos.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048c9.bin
6fc3e97c97d5429f09264059b37e8b2b3216eeb714c578ae6bbece5b56615bd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x48C9 4864 bytes
font_01_sfnt_off00005911.bin
cadf88e829b1a7c7bf668204c9365cd629b349b0c1344084f5f707cf3d478511
pdf-font-stream PDF embedded font (sfnt) at offset 0x5911 11684 bytes
font_02_sfnt_off00007e4d.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E4D 4324 bytes
font_03_sfnt_off00008c4e.bin
1299dbf4d5f22a9081491b0d656c3174559eb9e282951c29232f8ddd71744278
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4E 4640 bytes