Malicious PDF — malware analysis report

Static analysis result for SHA-256 5387679285fb6897…

MALICIOUS

PDF

57.4 KB Created: 2020-08-31 07:01:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 138da0e35bc5ccebda8d50b630111d02 SHA-1: f9e8ad6175ef5817b26a2c329d5d7d408df91391 SHA-256: 5387679285fb68971dafc0c0741ea33ec2ae12bf44f27c4e43fb034edbaff5f6
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the primary malicious URL. The presence of numerous links suggests a broad phishing or scam campaign aiming to direct users to potentially harmful content. 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.com/wix?keyword=akko+x+ursula
    • https://static.usrfiles.com/ugd/bf650e_182adffae87b4fadbb9d721121ed8b98.pdf
    • https://static.usrfiles.com/ugd/52b593_3febaa233aa34f61be1b3f73abe4fbb9.pdf
    • https://static.usrfiles.com/ugd/8ab72e_980a0c5fcfe44c7191923bbb86edb5d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e2d0362b9c4402db62c9296864173e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_abcc28a4d8af49968202b82dd3743905.pdf
    • https://cdn.shopify.com/s/files/1/0432/6558/9414/files/british_english_grammar_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7687/files/machael_jackson_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0465/9642/3845/files/angry_birds_rio_movie.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/tulixaganofixetoserijer.pdf
    • https://cdn.shopify.com/s/files/1/0429/6146/9596/files/mac_central_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2655/files/fepexe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6654/0711/files/donojejibatimusija.pdf
    • https://cdn.shopify.com/s/files/1/0438/2549/6221/files/toduzexojapakuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6677/files/temple_run_2_cheats_apk_android.pdf
    • https://cdn.shopify.com/s/files/1/0440/2534/8261/files/medio_ambiente_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0463/1743/7088/files/hoste_under_tidlig_graviditet_skadel.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_off0000843b.bin
3e43f2a1e406475d532397e9fcfd49c714916387bb219d26c8dca7184f7d4522		 pdf-font-stream PDF embedded font (sfnt) at offset 0x843B 2920 bytes
font_01_sfnt_off00008ea1.bin
a9b02fe677c9da37b2a15001e0021aabc43fee182f00a1d11022063eb38d42bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA1 4800 bytes
font_02_sfnt_off00009f04.bin
bd8c5a7881c47b2a14509c3da8b0f7737b41fb6e80ea3ba0027daf8ce71a92c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F04 10224 bytes
font_03_sfnt_off0000c230.bin
3adc6e07b2a3bb1e92fcc184757778b3f9b350d5567b988c5b82b01311e8649d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC230 16468 bytes

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