Malicious PDF — malware analysis report

Static analysis result for SHA-256 19845a75c9711866…

MALICIOUS

PDF

44.0 KB Created: 2020-08-23 16:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3a17f6bd6643cd4dc0b0e4b79005ab7 SHA-1: 216612dc7db06c09af0e3731dea6ec55456cfd10 SHA-256: 19845a75c97118668152be3a8a3c23c2597d5bd941ceebbfeeea7f8ceed19e3f
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One primary link, 'https://ttraff.com/pify?keyword=valentine+day+bengali+movie+free', is flagged as a malicious redirector, indicating an attempt to lead users to harmful content. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=valentine+day+bengali+movie+free
    • http://files.aspengrovepreschool.com/uploads/1/3/1/4/131482892/4548290.pdf
    • http://files.angelamarquezdesign.com/uploads/1/3/1/4/131409794/fomazituz.pdf
    • http://files.psychologycenterofaustin.com/uploads/1/3/0/8/130873795/1249532.pdf
    • http://files.amoderneducation.com/uploads/1/3/1/8/131872105/4627160.pdf
    • http://files.pamensgymnastics.com/uploads/1/3/2/8/132814305/1096089.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0436/9501/4042/files/siwamopajuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/0180/7007/files/77855176586.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3333/files/the_ice_storm_full_movie_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/test_on_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/20929498610.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2343/files/jawepenigusexutoxolijix.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/sql_plsql_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/9766/9278/files/dakidevex.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/zepexadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/tematazuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1852/5599/files/masked_singer_monster_performance_episode_6.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ad4.bin
1000e847bf5fe806db1bfba7eefa3bbb430e525113b0c8bc5be00ade7a6e2c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD4 5316 bytes
font_01_sfnt_off00006ce1.bin
258b64db117df906644320a9a181e63a63ab6ee7c44c0aa4aea26f4d6110f256		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE1 5312 bytes
font_02_sfnt_off00007e42.bin
661681ac64789682e90e0ff487b8c2495919e5cede3415d2721460677e895fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E42 10104 bytes

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