Malicious PDF — malware analysis report

Static analysis result for SHA-256 a37e62582795cd2e…

MALICIOUS

PDF

46.3 KB Created: 2020-11-02 22:23:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c71571669b90572f4cbb6e1e2d66e056 SHA-1: 7780391ea7cd5a002ea551a381c546ad2e8568cd SHA-256: a37e62582795cd2e93122b4e9a13baba31fecb609b2b9d6c647d78992984dd5f
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains this URL and also references a link farm heuristic, indicating a large number of outbound links. The ML classifier strongly flagged this PDF as malicious, and the presence of urgency language further supports a phishing or scam attempt.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/123?keyword=character+traits+of+hephaestus
    • https://cdn-cms.f-static.net/uploads/4385235/normal_5f9e4a09ef790.pdf
    • https://dasitonaz.weebly.com/uploads/1/3/4/3/134379343/sojurogaduwuda_pekasu_xigupamuzaso_gekutupugeg.pdf
    • https://cdn-cms.f-static.net/uploads/4375716/normal_5f9a3c0671999.pdf
    • https://gakuwalexutibok.weebly.com/uploads/1/3/4/3/134332976/xopolenud.pdf
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f8af9bb38019.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9766/1348/files/vojejujixepe.pdf
    • https://uploads.strikinglycdn.com/files/8a062458-566b-47fd-bdc1-c1767904ea8c/adobe_photoshop_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/8911/4789/files/54384305481.pdf
    • https://cdn.shopify.com/s/files/1/0505/1102/0224/files/ps2_emulator_games_for_android.pdf
    • https://uploads.strikinglycdn.com/files/f98ef5a4-44b3-4f3c-ac64-21496739aec3/fabewilenizosubolisurolu.pdf
    • https://uploads.strikinglycdn.com/files/b3d695b8-2b48-448e-b9c6-0fec8e1dbc56/kitanabujisikuvuf.pdf
    • https://cdn.shopify.com/s/files/1/0507/1536/1440/files/the_hunger_artist_csi.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_off0000744e.bin
69977ec6a2be0f417f99e668582b5b91130e63b41f47ab02381026d7accb5ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x744E 4976 bytes
font_01_sfnt_off00008533.bin
3647618ca64dd677a5651f7f12c59b952eea00d5b2f036acfbf3abf3421e9a0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8533 11540 bytes

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