Malicious PDF — malware analysis report

Static analysis result for SHA-256 301b2bfffd229818…

MALICIOUS

PDF

43.6 KB Created: 2020-09-19 19:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0b6ea1f0dc92a93c9ec8ae68bb829063 SHA-1: 914e10b0943f5d1b2e2c83da41409024f55bf2e8 SHA-256: 301b2bfffd2298185c1164e5348d80957bea8397a8663b85c815f5fa93106a48
92 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, contains text related to 'torrent apk download for windows 10' and the malicious URL. This suggests the document's primary purpose is to trick the user into visiting the malicious URL by posing as a software download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.club/wix?keyword=torrent+apk+download+for+windows+10
    • https://f71ab7d1-cf5e-4f7f-b3bc-a1c177be443f.filesusr.com/ugd/defcb2_2f0e30729e3a4ac5906d80774f0c70d3.pdf?index=true
    • https://3260c9e6-5308-4469-9453-cd2258a774de.filesusr.com/ugd/ddb60a_594ec207983a4060b3d61f8a2000bc09.pdf?index=true
    • https://4d4fe970-b531-4e7f-b520-efe95ddd79f8.filesusr.com/ugd/ee6100_29c126cb869d4a399bca4a6b5ffe0b98.pdf?index=true
    • https://1d984955-9454-4055-929e-56ab23e89ae8.filesusr.com/ugd/22739b_7e29965f2cb040328c29d2bb56410a45.pdf?index=true
    • https://9a2eb058-40c7-4af5-b196-0777a32d4ca8.filesusr.com/ugd/808cd0_44bd46f3d8a440eba6522c3e0e7b7845.pdf?index=true
    • https://225d4c94-17e2-49fa-a8ff-43fb01ea54bc.filesusr.com/ugd/270e53_cd32919f173246a695ca6ef26d817d29.pdf?index=true
    • https://61f00c5f-a868-4b52-8eda-597c229181af.filesusr.com/ugd/c162b3_bcf7bfec773f410598cd8570f0607aac.pdf?index=true
    • https://68127265-456b-4a50-8550-fd35a0468d38.filesusr.com/ugd/90423f_9f90a438f6794fa3b645f21d09340841.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_off00005ad6.bin
f632f2f151f09cd43c0e860b4a9857f3789adb829f9da42ec054a87fd71c012f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 5120 bytes
font_01_sfnt_off00006c5d.bin
d60f798dc0cb0298ad26f461fe710afc12c264531c43eac1071e65003c1a6a56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C5D 11076 bytes
font_02_sfnt_off0000924b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x924B 4324 bytes

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