Malicious PDF — malware analysis report

Static analysis result for SHA-256 8140284e5e0bb83d…

MALICIOUS

PDF

72.2 KB Created: 2020-08-23 00:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ab4aec8c57ada3c6a5ab794e34ac9f8 SHA-1: 48d16badeb76b131f10a06688b49c0396e81ec4e SHA-256: 8140284e5e0bb83de0b56287717a40d553822dbf3b24d79b3d81cd268f7494a1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the primary links redirects to a known malicious domain, indicating an attempt to lead the user to harmful infrastructure. 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/pify?keyword=time+am+pm+ki+full+form
    • http://files.mybluethumb.com/uploads/1/3/0/7/130775350/2d99247.pdf
    • http://files.parkesautodetailing.com/uploads/1/3/1/8/131856374/73de7231b22.pdf
    • http://begupu.newwoodturners.org/uploads/1/3/2/7/132740267/zoboregekalamojaba.pdf
    • http://files.tanawanhandycraft.com/uploads/1/3/0/9/130969061/9083761.pdf
    • http://jefafot.marriottediting.com/uploads/1/3/1/4/131408899/matelujivili-rejavumuj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/6540/1753/files/rusetuvuxabomopunitilafu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5066/files/raxemalaforim.pdf
    • https://cdn.shopify.com/s/files/1/0428/3236/3676/files/33677807583.pdf
    • https://cdn.shopify.com/s/files/1/0440/8341/3142/files/alone_together_sherry_turkle_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/6625/3724/files/mitosis_questions_worksheet_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/1537/0912/files/58555785002.pdf
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/kadamban_movie_in_kutty_movies.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6586/files/gogowesasegusupobiguzef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1970/6279/files/sabagilusibevakonefuda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/xitonewas.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/excel_bedingte_formatierung_komplette_zeile_einfrben.pdf
    • https://cdn.shopify.com/s/files/1/0427/6797/4556/files/rafapekeganiduka.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/99503064371.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/
    • http://scripts.sil.org/OFL
    • http://sinhala.sourceforge.net/
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITS
    • http://www.gnu.org/licenses/gpl-2.0.html

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b4ac.bin
23f582c7dc8e7a43f3f09199624c9ad53997d6cf6d7b84901384a53054ce6035		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4AC 3896 bytes
font_01_sfnt_off0000c271.bin
74a33c83e5e65c667db9bc0c49950b0ca5979d080821e4318a5b7479901d0e1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC271 4580 bytes
font_02_sfnt_off0000d1b9.bin
72d9d9b07811deb4d24617f9702a134415f6eec194c8b2ea383df341a16b8a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B9 4784 bytes
font_03_sfnt_off0000e18e.bin
ce8fd254f199a90d856dca079e89fe4d2af72a17674335b042d0458b722da895		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE18E 10348 bytes
font_04_sfnt_off00010500.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 4324 bytes

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