Malicious PDF — malware analysis report

Static analysis result for SHA-256 16af177d53d34857…

MALICIOUS

PDF

51.8 KB Created: 2020-09-01 00:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 644652d11ee58d429a744c9d536026e9 SHA-1: 5b411124edefd89b6219ceb983eb72a58ebd5f21 SHA-256: 16af177d53d34857b245fff0377aa16a832d4a2d59b2567be46a89fd1b73db24
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=attack+on+titans+manga+pdf', suggesting a lure to download potentially malicious content disguised as 'Attack on Titans' manga. The presence of numerous other PDF links further indicates a link farm or redirection scheme.

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=attack+on+titans+manga+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_cec04c638e034c9bb057eca5ea089791.pdf
    • https://static.usrfiles.com/ugd/c33cdb_6b6be36a452c48e8b422d89797dc49c8.pdf
    • https://static.usrfiles.com/ugd/9734e7_21672c55a5bb40bab92357f4c27e58f1.pdf
    • https://static.usrfiles.com/ugd/b8c837_de08946a9d27462793c77bec0e9c467d.pdf
    • https://static.usrfiles.com/ugd/87fdc7_516570c0cda249a0b93835a4716a8771.pdf
    • https://cdn.shopify.com/s/files/1/0447/9824/7069/files/17_note_kalimba_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/annamayya_telugu_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/8442/2051/files/sophocles_antigone_fagles.pdf
    • https://cdn.shopify.com/s/files/1/0436/9540/7269/files/how_to_write_a_good_readme.pdf
    • https://cdn.shopify.com/s/files/1/0431/3533/6616/files/criminal_minds_the_wheels_on_the_bus.pdf
    • https://cdn.shopify.com/s/files/1/0428/5733/2895/files/93111894467.pdf
    • https://cdn.shopify.com/s/files/1/0434/9270/4408/files/50612066513.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/avid_dnxhd_codec_mac.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000734b.bin
8a08cef61f1eb666c626c3d1f867a94b122ca53b15da9baf19b12682c1364eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734B 7816 bytes
font_01_sfnt_off00008d6a.bin
914ceec0a640c08e9ffd8f1c0c604781ddaa99a852951bbdecc12eec565f31e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6A 5400 bytes
font_02_sfnt_off00009fc5.bin
33b8415d104bd877a2ed9cdb3538cd6638def5d09ea4878e6eeb96d2fb78a032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC5 10044 bytes

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