Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a404573efb10b20…

MALICIOUS

PDF

41.3 KB Created: 2020-09-07 12:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c7ed36b58c31179b61a9d4e4999ad4ff SHA-1: f2240ed0df9e7a26b6c484fc445519d0746aa2ea SHA-256: 6a404573efb10b20775db4981a7528e7ca0cdad4f32912beb8e431cbc9493ac5
194 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.club/wix?keyword=hp+password+reset+disk+free', points to known malicious redirector infrastructure. The document body and heuristics suggest a lure for password reset information, likely a phishing attempt. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing malicious content.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=hp+password+reset+disk+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/39400462849.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/bifusezulomazag.pdf
    • https://cdn.shopify.com/s/files/1/0431/7485/4812/files/abacus_maths_tutorial_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0457/9518/0710/files/wefadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6790/0061/files/79490124980.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9444/files/mogadobapebikexuvemipe.pdf
    • https://static.usrfiles.com/ugd/b52961_47c19c9cfdea450d8114ff1a56415e30.pdf
    • https://static.usrfiles.com/ugd/b8c837_68ddddd5a1754db5928c765591c206e2.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_86f5088169c1457194ccf459f7a55e58.pdf
    • https://static.usrfiles.com/ugd/544c7e_495ae705085649f5a949f2e025ac6361.pdf
    • https://static.usrfiles.com/ugd/f103bb_75eeeda54394449a9bbec847e96ab17d.pdf
    • https://static.usrfiles.com/ugd/4e6dd5_a74d53037dd24ae3b8b52d1d4c5c769a.pdf
    • https://static.usrfiles.com/ugd/cc03df_9a750b04803d4211814fd10ec411c7d7.pdf
    • https://static.usrfiles.com/ugd/7d1dc9_58346d21d1f14a50ad64be6da7e4e042.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_off00006465.bin
bb6a9becd6d7644906784254a6e14a78b05f391e1ecb40e158226a5d991e96ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 5120 bytes
font_01_sfnt_off000075f3.bin
44c8e76a9f08d6c7a8b9f2a570e1f77c607e90f8af7c991d1b711932d74b03fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75F3 10128 bytes

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