Malicious PDF — malware analysis report

Static analysis result for SHA-256 118653640adebdfb…

MALICIOUS

PDF

37.2 KB Created: 2020-08-23 17:59:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b958f02d4bfc9f45d89aae643554de5a SHA-1: 3481b7339892c925da27865e684fbcb5dfa1957d SHA-256: 118653640adebdfb4b01ab0610760d0b9875d7df6c1b2f5615c1d1916f33bc89
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 partially corrupted, contains text related to 'anti ragging form polytechnic' and a URL that appears to be part of a link farm, suggesting a lure to external malicious content.

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=anti+ragging+form+polytechnic
    • http://tajerati.losttribesflorida.com/uploads/1/3/1/4/131407558/devopexunelijaza.pdf
    • http://files.crimsonshults.com/uploads/1/3/0/9/130969075/fejikojarini.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0794/2549/files/javixivajegakagumo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/radomojokatubugaraz.pdf
    • https://cdn.shopify.com/s/files/1/0432/9160/7190/files/79815428623.pdf
    • https://cdn.shopify.com/s/files/1/0433/8833/8330/files/best_website_templates_for_professional_photographers.pdf
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/xarizaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/5245/8396/files/anti_skid_braking_system_in_aircraft.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/american_english_file_3_final_exam_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/9070/6589/files/aliments_acidifiants_et_alcalinisants.pdf
    • https://cdn.shopify.com/s/files/1/0432/1135/8369/files/collective_soul_dosage.pdf
    • https://cdn.shopify.com/s/files/1/0427/6148/6503/files/magurepotepirifilonowo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9368/0547/files/achilles_tendonitis_rehab_exercises.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_off0000461a.bin
7c113db1c8981ea0f83293b419fa6850cc9048a5bc5a4fca27fa1c83d6b1e332		 pdf-font-stream PDF embedded font (sfnt) at offset 0x461A 5132 bytes
font_01_sfnt_off0000575f.bin
66abe8b664fefe50c48076f1d6836b3d05a781457096c85386191663634f5f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575F 10208 bytes
font_02_sfnt_off00007a4c.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A4C 4324 bytes

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