Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4b387a292aa6df1…

MALICIOUS

PDF

61.0 KB Created: 2020-09-06 03:39:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f35bbc374eb64760f061d40f6bb78758 SHA-1: ace70a722d8cb8d09be28c219e02103e0bbe6268 SHA-256: e4b387a292aa6df15449d21997a1684d53184d035f1209af8a2f1903ff755756
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely used to deliver a secondary payload. The document body, though heavily obfuscated, contains the same song title used in the malicious URL, suggesting a lure to entice users to click the link. The presence of numerous other PDF links, many pointing to static.usrfiles.com, indicates a link farm strategy, potentially for SEO poisoning or to obscure the primary malicious destination. No scripts were extracted from this sample.

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.me/wix?keyword=pet+bechara+bhukh+ka+mara+song
    • https://cdn.shopify.com/s/files/1/0440/5769/0262/files/48051328168.pdf
    • https://cdn.shopify.com/s/files/1/0434/4466/6529/files/ekahau_sidekick_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3686/0839/files/visimafomum.pdf
    • https://static.usrfiles.com/ugd/6f7357_a643a8317ed34211b076ba22387ef928.pdf
    • https://static.usrfiles.com/ugd/1e8759_36ac1bb2c7dd4480954b404123d0a312.pdf
    • https://static.usrfiles.com/ugd/dfb5f8_4c5038301a2e43e3b8388efd8058d931.pdf
    • https://static.usrfiles.com/ugd/a0d21a_3641f436288b452daa119874bae2b3bf.pdf
    • https://static.usrfiles.com/ugd/726ec9_c1a8ff8bda7e49f9ad1abb429b0caf9d.pdf
    • https://static.usrfiles.com/ugd/b8c837_946623de2c8d4ae1bfa3c9e658859ce4.pdf
    • https://static.usrfiles.com/ugd/f09a9d_564ca1eb7bb34360b3362c7fe4a0ba7b.pdf
    • https://static.usrfiles.com/ugd/2ca09c_83140526ac284750af2a339722b9e069.pdf
    • https://static.usrfiles.com/ugd/11f207_500e88f51a744af1824ad31b37a93bb6.pdf
    • https://static.usrfiles.com/ugd/851c7c_1750634e83c34ae08632ee5b2413cbe9.pdf
    • https://static.usrfiles.com/ugd/baef12_fb69c0f3cfdd4cf580cce10ca8854dc4.pdf
    • https://static.usrfiles.com/ugd/93971e_4288cbc97e69430a817fa927f728f3af.pdf
    • https://static.usrfiles.com/ugd/b8c837_86e0a1df3c06419284ae1ae96e394199.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_off000069f7.bin
81e255da37645658c351a914b4917c25849c16b4104c83d587d60248e7aa83c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F7 5384 bytes
font_01_sfnt_off00007c18.bin
40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C18 3720 bytes
font_02_sfnt_off0000877a.bin
0b5a7e9300997a86f536fc851f7bdda4029b1cf0fa71b3d5cab34a8043a291ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x877A 16120 bytes
font_03_sfnt_off0000b82b.bin
230df8017a85ea93a5c886159708d72349b7227190d262bf2e9082262302ac19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB82B 16384 bytes
font_04_sfnt_off0000ce32.bin
92c718fde9f456e0f1e33fde5f8f58db8b3f2106471b2bb9be940a427803c5c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 6764 bytes

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