Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a180d5c1a5daf4a…

MALICIOUS

PDF

47.4 KB Created: 2020-08-23 00:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64eafea255dd8a05d3302be3315a5024 SHA-1: c6305de8fe986455980c31d9d2fc3af1f1a2e58d SHA-256: 0a180d5c1a5daf4a26406166fd7e40798967c645490bc7e5897ac3b380004d79
154 Risk Score

Malware Insights

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

The PDF contains numerous links, with one specifically pointing to a known malicious redirector infrastructure. The document body text, though partially corrupted, includes the same URL and a seemingly benign PDF title, suggesting a lure to a malicious site. The presence of many external PDF links, including benign ones, indicates a link farm strategy to obscure the malicious destination.

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=carpal+tunnel+syndrome+protocol+pdf
    • http://files.simplyberger.com/uploads/1/3/1/4/131407112/titef.pdf
    • http://files.exploreniseko-activitycentre.com/uploads/1/3/0/9/130969183/lobamolisozebe-ruvejivafuv.pdf
    • http://files.exmouthcaninecentre.co.uk/uploads/1/3/0/8/130874128/jenasaj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/3722/8188/files/vocabulary_words_with_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0458/0658/3974/files/92465439301.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3549/files/46060989949.pdf
    • https://cdn.shopify.com/s/files/1/0434/0088/8469/files/30065404600.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/windows_longhorn_iso.pdf
    • https://cdn.shopify.com/s/files/1/0436/1961/4884/files/odia_song_sambalpuri.pdf
    • https://cdn.shopify.com/s/files/1/0462/7156/1890/files/gaxedeluraravajan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/winrar_64bit_win_10_full_crack.pdf
    • https://cdn.shopify.com/s/files/1/0434/9077/1110/files/kautilya_arthashastra_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/pdf_file_converter_free.pdf
    • https://cdn.shopify.com/s/files/1/0441/3086/1208/files/what_is_su2._ff._avast._com.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_off00006eea.bin
7b8b2b6bde5ed15cbf3b08c711aa700d7d24239ad1c7e1daeea907b6ca2c6b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EEA 5260 bytes
font_01_sfnt_off000080bd.bin
b7b5ed258b9735885c14eb40776c96938142fec27fe54a0dfa6c4840daa2ec54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80BD 9956 bytes
font_02_sfnt_off0000a2c6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA2C6 4324 bytes

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