Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb51c63ab247229d…

MALICIOUS

PDF

35.4 KB Created: 2020-09-18 09:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbb8d8e766d4828b64e3b7dc56ab85d8 SHA-1: 8cf177108b88c8d48787ce7ddd2d6591a88a0b55 SHA-256: cb51c63ab247229d6b1bf0ca8603ac09eebbc3f65f4aed365b9f8e7c922b74e0
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to a link farm designed to host other PDFs. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.club'. The document body, though partially corrupted, contains text related to 'It chapter 2 google drive mp4 download', suggesting a lure for potentially pirated content. The primary attack pattern involves redirecting users through a chain of links, with the initial redirector being confirmed 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.club/wix?keyword=it+chapter+2+google+drive+mp4+download
    • https://c0ba5c40-42ae-463e-a
    • https://7973bb12-df17-45cc-8a59-df29e5d32d04.filesusr.com/ugd/89064d_a03f20fb05014811a89dbf3abab79526.pdf?index=true
    • https://82bc1019-5cdc-4c34-b571-de7bbf369666.filesusr.com/ugd/badafb_fb5b679de9764784a0298130533b6645.pdf?index=true
    • https://a727ee0b-5fbe-46d8-a760-446bb9af8534.filesusr.com/ugd/5bf82b_d10d78ff2ab843dd9902bd595ceea444.pdf?index=true
    • https://527e99c6-7078-462c-83e7-ca696bf05f89.filesusr.com/ugd/4c7633_63d08b7bea10413cb7d19e3890c65457.pdf?index=true
    • https://ff00d0a4-38b0-460b-9d1d-e79ebb270157.filesusr.com/ugd/154db6_07e9c1d036cb4cb689d7712e91cb0767.pdf?index=true
    • https://c956d2c0-ce0a-436c-bad8-61b4010a7472.filesusr.com/ugd/d19ca0_63ac21fa535e4ed0a057d2436306e22b.pdf?index=true
    • https://1809d16b-633d-4437-8bd1-a7597816bf92.filesusr.com/ugd/bfbc46_17b9c54410614054add75509effeaabc.pdf?index=true
    • https://c4bcea55-f294-4122-ae84-63b783e23782.filesusr.com/ugd/61b8bf_f7e09cd45b16419abc354ed08c42f9ac.pdf?index=true
    • https://c231a120-030b-462e-92d1-428cdbb8b8f6.filesusr.com/ugd/ebcc4b_6b71ab78b55442aa85045da41c971a8f.pdf?index=true
    • https://bceed014-000a-435c-9b16-c6ac63b417f7.filesusr.com/ugd/b7082a_46910a3007334d8f99a093ba05c3ac37.pdf?index=true
    • https://03e2955f-2cf2-4751-88e3-a4454e515961.filesusr.com/ugd/cf9ff1_c562c3b9e3a04241b2d11477485b16d8.pdf?index=true
    • https://12fc80f6-b584-47b1-b0b1-2d5cff43a17f.filesusr.com/ugd/bc0b97_fc7307a1090440a79d9b582d3c444e87.pdf?index=true
    • https://c0ba5c40-42ae-463e-a66f-8279d3c55a53.filesusr.com/ugd/8a05ec_9b22f8693c704e70b7463bd2b6b1c063.pdf?index=true
    • https://088d6052-cceb-421e-929d-79908b8f1260.filesusr.com/ugd/c88839_579b749b89524d578f9fcf8367923682.pdf?index=true
    • https://7b5abf74-b3ce-45eb-8ca4-62daea2f7180.filesusr.com/ugd/72b0e7_5858097485bd45ce8ac5dfdfb43fb985.pdf?index=true
    • https://0f8644ef-c973-4cfb-8c3d-0ce3516af7fe.filesusr.com/ugd/ebcc4b_5fa9448806874e2fbf37a02e96e225e5.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b0d.bin
2209aa6a035f94586938508128575ed46a00d96a0586b0b1b7f34e758813c227		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0D 5616 bytes
font_01_sfnt_off00005e18.bin
606a5273101033a8f7fd2401768d4e480a5c9a232108adb71775d31f2aba7708		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E18 10136 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.