Malicious PDF — malware analysis report

Static analysis result for SHA-256 0029c90cfe84e4c6…

MALICIOUS

PDF

50.7 KB Created: 2020-08-31 09:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b69e57cd68d35e8e41cc4c5bb7f327c6 SHA-1: 2f4ee45382ad1c4ae353e0f5d5e7f4333bb51c5b SHA-256: 0029c90cfe84e4c62d51c79d46fde890863f9f14ae8fb5af4b1201a816d5bab8
162 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a known malicious domain, disguised with a lure related to an iPhone download. This indicates a phishing or social engineering attempt to redirect the user to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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.com/wix?keyword=iphone+xr+ios+12.2+download+blob+image
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/18f527_4ea32c10768b4d86b24ee89fb4f241f0.pdf
    • https://static.usrfiles.com/ugd/e2b09b_7edd1918ee704873bc0ff5e6b99a4595.pdf
    • https://static.usrfiles.com/ugd/913720_8f9c644395e14512aa78e54e0aa47a92.pdf
    • https://static.usrfiles.com/ugd/b8c837_3f434805ddda4e75bd6a79c4399aa167.pdf
    • https://static.usrfiles.com/ugd/b58d21_e0872c4e02e04903899afcb53ff9c969.pdf
    • https://static.usrfiles.com/ugd/913720_2b12e130597747348c407be70a9e9b30.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_228f26479dd5468bba05de979eac5e91.pdf
    • https://static.usrfiles.com/ugd/09c3c7_7cbe8303cd7b4b7f9a58690217b5c46b.pdf
    • https://static.usrfiles.com/ugd/432b07_e3b3aad22207448cae26d79c59e59ce9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c61a0aee4fac4d42a7e57be25f962646.pdf
    • https://static.usrfiles.com/ugd/2b25b5_2d46553957c648f9a6ae9306b9d09c68.pdf
    • https://static.usrfiles.com/ugd/d54300_afc64d23db6e4cf198600c77d7147032.pdf
    • https://static.usrfiles.com/ugd/b8c837_cde6f7be8ae44dd7b0f8daee212e6ceb.pdf
    • https://static.usrfiles.com/ugd/ee4a13_cd57bee1de6a4a8596284e19922c42b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_153ecf9950d243c89120531898891fff.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cc2.bin
80d79fddd3b550728abfa9cfdeda76fbe910d0c66acc9be59ca7388b982ddcc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC2 5824 bytes
font_01_sfnt_off00009078.bin
702060888c4635a6572eb835dc74156155367906564430ac029cb5f0baaebeca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9078 14424 bytes

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