Malicious PDF — malware analysis report

Static analysis result for SHA-256 092be7263928738a…

MALICIOUS

PDF

47.0 KB Created: 2020-08-06 00:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 45162897d37a1f74a8cfc42d05fb0a2b SHA-1: 9b8b3207a7a63011a39ea09b1a46a6954c226e73 SHA-256: 092be7263928738a53a739cc79df2792e33c06fcf90d6034716977feb5707b8a
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains URLs that are likely part of a link farm or phishing attempt, aiming to redirect users to malicious sites.

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.cc/pify?keyword=train+d+atterrissage+avion+pdf
    • http://files.aanenetwork.org/uploads/1/3/1/4/131437472/vagiwofa-lejipowariteja.pdf
    • http://files.andairewenatchee.com/uploads/1/3/1/3/131383319/2b015f15f57f.pdf
    • http://files.seniorexpousa.com/uploads/1/3/2/6/132681863/112d85d999d3363.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0436/6001/7814/files/dark_souls_2_sunlight_spear.pdf
    • https://cdn.shopify.com/s/files/1/0432/5693/8658/files/83877537656.pdf
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/the_complete_manual_of_suicide.pdf
    • https://cdn.shopify.com/s/files/1/0432/9432/6949/files/bowomoneposuzikilugolowin.pdf
    • https://cdn.shopify.com/s/files/1/0447/6986/9975/files/wings_birdy_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9426/files/pevipine.pdf
    • https://cdn.shopify.com/s/files/1/0433/9800/4899/files/birds_name_with_pictures_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0431/2888/1313/files/ffxiv_the_time_between_the_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0431/6843/2288/files/16893071437.pdf
    • https://cdn.shopify.com/s/files/1/0432/8977/2187/files/calvary_chapel_distinctives.pdf
    • https://cdn.shopify.com/s/files/1/0432/0326/4667/files/jibulemiwuvug.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/livro_de_administrao_financeira_e_oramentria_para_concursos.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4024/files/gonidaduribona.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dedifoniwupub.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5746/files/iphone_low_power_mode.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_off00006d7e.bin
7f2ebdb794ba19e1e9887ab4c72df920b02b6e9e1179f4c1f4564d916bc7cf0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7E 4976 bytes
font_01_sfnt_off00007e79.bin
788c41a488646e1622a5c891f424403412d30b38b4f2a9d5e3d2eb63f4612899		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 9916 bytes
font_02_sfnt_off0000a077.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA077 4324 bytes

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