Malicious PDF — malware analysis report

Static analysis result for SHA-256 632763138ad043eb…

MALICIOUS

PDF

48.2 KB Created: 2020-08-01 08:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 89bb6a89b8da77025ad29bed1c3631a1 SHA-1: 961790e8660bc0873fdef919c00af2c638fbcb11 SHA-256: 632763138ad043eb43226b0dab43fe07bde0116c4bc1529baf673d4e888f3da3
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=black+history+bulletin+board
    • http://files.betheone.co/uploads/1/3/0/7/130740175/1369760.pdf
    • http://files.vaniahair.com/uploads/1/3/0/8/130873826/gudajuvis.pdf
    • http://files.timsailer.com/uploads/1/3/1/1/131163931/08e16.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/2973/2248/files/kemame.pdf
    • https://cdn.shopify.com/s/files/1/0431/2154/1271/files/82540555169.pdf
    • https://cdn.shopify.com/s/files/1/0428/9842/3967/files/46698264792.pdf
    • https://cdn.shopify.com/s/files/1/0436/2610/2947/files/dovusagedegetewimupoz.pdf
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/kepepujadelukoxuzozusilo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/22504325426.pdf
    • https://cdn.shopify.com/s/files/1/0428/1725/7628/files/naxalotofinujadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/56471333287.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/bonoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/54383290742.pdf
    • https://cdn.shopify.com/s/files/1/0431/2124/6359/files/koloferav.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/puturalava.pdf
    • https://cdn.shopify.com/s/files/1/0429/6415/6582/files/bag_of_jelly_beans_wizard101.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c51.bin
d0c8cbce93e9ac40de4a8743773ab2784d1ae6be0e7983be09ab75717d42d260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C51 5384 bytes
font_01_sfnt_off00006e90.bin
4deb3b27344a02e0dde260d2c98c676660448ad1cd3d374a096284cd17cf9ce7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 2144 bytes
font_02_sfnt_off0000789b.bin
fc4bab4e75a9f9ee920b6069b81901dd99b011ec0e0de11e6761e65e29e44685		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789B 11220 bytes
font_03_sfnt_off00009ede.bin
bc1c1644e30597ae0beaac312b9749a82b64e26c109397326cdc67fdbaf2fe17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDE 16036 bytes

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