Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dbbf2ccfd018de8…

MALICIOUS

PDF

47.8 KB Created: 2020-08-30 02:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c1d0b94489b615ab28d8a9434539059 SHA-1: 8bda36e1923ea077502fd7dc04c566c1ed1bf7a1 SHA-256: 0dbbf2ccfd018de89043ffbd9aa77dbe0798fcd72434ab33645b25ceddb6a32f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, appears to be a lure for a free audiobook, suggesting a phishing or scam attempt. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to further malicious content.

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=los+4+acuerdos+audiolibro+completo+mp3+gratis
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/97634b_9a96e019a8764c1281265cf6c2d15c8f.pdf
    • https://static.usrfiles.com/ugd/0d089b_4ad115d8ab2f46598a89400660e7ae11.pdf
    • https://static.usrfiles.com/ugd/a18aa6_35777e9ba33343e6b74c65522ec4324a.pdf
    • https://cdn.shopify.com/s/files/1/0429/5199/9637/files/vuzitolezurepupivu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7896/files/36600428.pdf
    • https://cdn.shopify.com/s/files/1/0436/0149/4179/files/yello_oh_yeah.pdf
    • https://cdn.shopify.com/s/files/1/0435/9480/9512/files/aap_beeti_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/78856957221.pdf
    • https://cdn.shopify.com/s/files/1/0431/3939/9842/files/faliwurozufelegu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/worlds_hardest_game_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0431/5955/2166/files/zelizerorowuzexa.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_off000052f2.bin
73071372aa9880185e01fba86f0e0705b34d0767996a6d10e512b78266cf6c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F2 5504 bytes
font_01_sfnt_off000065ab.bin
a9fb4f2f5040b72dc2d217536cf674876e3b5d76e35cb4350a3d094cd80e30fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AB 11956 bytes
font_02_sfnt_off00008c74.bin
1f2f4c1f37b06e21d6d732ff4318e97974f262b665b0665733ba3df501d49906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 16372 bytes
font_03_sfnt_off0000a1e5.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1E5 4324 bytes

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