Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c302d9e2103b12b…

MALICIOUS

PDF

47.0 KB Created: 2020-08-13 23:08:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 14548d9791d297591c28296489abb3f2 SHA-1: 21e78d5b2100e958a47363f78a36a2992688cdd2 SHA-256: 6c302d9e2103b12b1cf656d971e7d6df5591aac2be02ac681b05a670b8392890
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the intended lure.

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=rpg+lan+multiplayer+android
    • http://files.lamar58.org/uploads/1/3/1/4/131411199/fajizipibelaper.pdf
    • http://dejov.laurylgaumer.com/uploads/1/3/2/6/132682076/5233590.pdf
    • http://files.timothybrownmusicnyc.com/uploads/1/3/1/3/131379343/8233653.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0773/5969/files/hallelujah_cohen_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/i_miss_you_kdrama.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/dejasafijofarebomoxeneto.pdf
    • https://cdn.shopify.com/s/files/1/0441/0369/6536/files/nebirudanawovisilos.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/48839399375.pdf
    • https://cdn.shopify.com/s/files/1/0431/1325/0972/files/tiempo_de_degradacion_del_plastico.pdf
    • https://cdn.shopify.com/s/files/1/0439/0433/6040/files/hedging_in_academic_writing_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/81796898897.pdf
    • https://cdn.shopify.com/s/files/1/0429/8034/3967/files/pares_magnticos_curativos_y_biomagnetismo_francisco_cuatrecasas.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/suvaxadoxolajala.pdf
    • https://cdn.shopify.com/s/files/1/0431/6092/8405/files/74999668045.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/komatsu_parts_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/jimuwoboweduk.pdf
    • https://cdn.shopify.com/s/files/1/0439/6669/3534/files/aadhar_card_form_download_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/56343132127.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_off00007b4e.bin
d8572eedaa7467b1d19e3ab9841831aaabcb4f375a766ba343e0715239bfaeff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4E 5212 bytes
font_01_sfnt_off00008cfa.bin
e209dc88d231d26781d28a738b1b09318ee7e4430a49d844431394176b73d48f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFA 10044 bytes

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