Malicious PDF — malware analysis report

Static analysis result for SHA-256 690779281e9cbaa0…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 12:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6e3b14ea62ab89de3fe286159064c3d SHA-1: 8694a0b70ab85edb3be29152c74224841022d845 SHA-256: 690779281e9cbaa08f4aeba6ac766b10d17105702c6fae6f5b0447ce3c4863f2
162 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a download button, which is a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt to drive traffic to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/wix?keyword=mozilla+pc+browser+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5ecadc_616b63647ea546149c00f86796bb9934.pdf
    • https://static.usrfiles.com/ugd/45e30f_3f7c63a3deed4fcebf63a525af2757ec.pdf
    • https://static.usrfiles.com/ugd/b8c837_785771358b144249a8f55fa1d806eb23.pdf
    • https://static.usrfiles.com/ugd/7e6083_9578ac4b4c17426493a85dd8fac7df61.pdf
    • https://static.usrfiles.com/ugd/b8c837_5182941cd8684036b6e0e4b4ad047ed1.pdf
    • https://static.usrfiles.com/ugd/3dd68e_2229429a93834ff99a7044c1a20687f6.pdf
    • https://static.usrfiles.com/ugd/5d2cf3_8454196d63ae4bee99e1a62eb7bd9ad2.pdf
    • https://static.usrfiles.com/ugd/f63f29_ddf54bd06c2e4b2e80f6f6f4a4224c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5d220dd90284c729c86f96fde353a67.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a1035ac50134c5da3e49d72c27d05b6.pdf
    • https://static.usrfiles.com/ugd/36f25b_fa5a78f680814b2da7264d55fa05d1a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a693f8d12254f0483d4c006fc52c01d.pdf
    • https://static.usrfiles.com/ugd/b8c837_39521c72e508469eb1881f03761e2d75.pdf
    • https://static.usrfiles.com/ugd/f46427_c6f29604cb094ae3b24565b4ee7d871d.pdf
    • https://static.usrfiles.com/ugd/06497e_41819ed31b9440b28624dde32f0f5555.pdf
    • https://static.usrfiles.com/ugd/ce14f3_659c94ed0c59405b86f1135124ebf019.pdf
    • https://static.usrfiles.com/ugd/b8c837_7dd0616201f9431fa549e7e12d60c31f.pdf
    • https://static.usrfiles.com/ugd/48d9a1_5a13fe0c72ce42e1b1bbdc7ff9d51618.pdf
    • https://static.usrfiles.com/ugd/54fa57_c51497819f094613802e40fe33058ab9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4855bdcf206e45aa8d822a3cba8c711f.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_off000073c5.bin
32bddfc8f95ef24b816c3f68babc22b2f3dd9d4e299c4123d4661033edc838a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C5 5296 bytes
font_01_sfnt_off000085f9.bin
0fc16741ea03f37e32b0ab14df96e385ce6457ad9ebe20308f45c7e72451d193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F9 10588 bytes

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