Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0fcf425dbae0316…

MALICIOUS

PDF

42.5 KB Created: 2020-08-30 03:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a7de5ccce823719fc0b8dfd5728a28b SHA-1: 7c5d7fbe073030431182f96388dfb92d5ddf3c0b SHA-256: b0fcf425dbae03166a510e27e2f83d556ca9f3599fed03a35979e863ef6481aa
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that are part of a link farm. The primary malicious URL identified is ttraff.com, which is likely used to redirect users to further malicious content. No scripts were extracted from this sample.

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=tomber+du+ciel+paroles
    • https://static.usrfiles.com/ugd/e02969_451d053fbad84861bee652e15c0435b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad8ec77c1d674a20b193146279898101.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_8ec83749843d4e2293554fe253b8957a.pdf
    • https://static.usrfiles.com/ugd/c83fdb_8cc5c9e29ae844fc8a7bb408fe54d6e0.pdf
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdf
    • https://static.usrfiles.com/ugd/b8c837_7916537059cc45f88ceacf1d70a4e61d.pdf
    • https://static.usrfiles.com/ugd/55cc32_c17cc9c787214dab86d88d6ab6398f24.pdf
    • https://static.usrfiles.com/ugd/b8c837_012c1a48c59c4d30b027a1d7a6c9ffdf.pdf
    • https://static.usrfiles.com/ugd/b8c837_3287f6c608f146e5b9d64f30e8c8d0a0.pdf
    • https://static.usrfiles.com/ugd/ddb60a_e84bfa639f3147c590ea99dbb2c35040.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_c35393cce4c04aa9ae6c732ec72d3f83.pdf
    • https://static.usrfiles.com/ugd/ea5d7b_a850533df0b245eaab26d0fa046e67a1.pdf
    • https://static.usrfiles.com/ugd/0df15e_6c368985abc04124af63c5499446a829.pdf
    • https://static.usrfiles.com/ugd/162fe6_62ea11c51a1143f7a72ab7e586edc3f4.pdf
    • https://static.usrfiles.com/ugd/e2b09b_f990f10c9aa44f3089d4123cac56485a.pdf
    • https://static.usrfiles.com/ugd/b8c837_264070d4c1084d1aa4fd2c8dec6a0501.pdf
    • https://static.usrfiles.com/ugd/b8c837_9cd1557c1c2947198157ca595f286777.pdf
    • https://static.usrfiles.com/ugd/05900a_6ebd8e22f8fa4516997cf1b5049937a1.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006371.bin
5fcebce6f6edded61265ffafe75c45f74f3489a676986de66b1f161759f25128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6371 5308 bytes
font_01_sfnt_off00007556.bin
c13ff44cc1d691c55591314992366589e1f555b3c3672ed9a5c04aff351529fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7556 12076 bytes

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