Malicious PDF — malware analysis report

Static analysis result for SHA-256 65e2c822c5a82f65…

MALICIOUS

PDF

44.6 KB Created: 2020-08-24 02:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f6abd75f5ad22453a0b928076b423a3 SHA-1: 6f25e45e1b54a5adf61cbbe12b6e4086bf12c2d5 SHA-256: 65e2c822c5a82f65b5b23c1488506079da41eac14cb8285cb049711658b74e0e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a significant number of links, many of which point to a redirector service known to host malicious content. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that is also flagged as a redirector, suggesting an attempt to lead the user to a malicious site. The presence of numerous external links, including a link farm, further supports the malicious intent.

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=alhambra+guided+tour+granada+spain
    • http://files.hrstewcrew.org/uploads/1/3/2/6/132682630/9858269.pdf
    • http://files.honingtonandsapiston.com/uploads/1/3/1/0/131070786/verexe_rafetusabuvuri_pibokudak.pdf
    • http://nusovuza.weatherpaige.com/uploads/1/3/1/1/131163774/tufexi_lekifewukele.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/2883/2675/files/11631755696.pdf
    • https://cdn.shopify.com/s/files/1/0435/8782/9928/files/jetifowaroniwibifewizen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4178/1920/files/63930675400.pdf
    • https://cdn.shopify.com/s/files/1/0431/0538/6657/files/90072602432.pdf
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/badazasosujizemewaxaduse.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/sm_bus_controller.pdf
    • https://cdn.shopify.com/s/files/1/0432/6073/9752/files/best_apps_to_annotates_on_ipad.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/13534048661.pdf
    • https://cdn.shopify.com/s/files/1/0429/7618/2426/files/78745836649.pdf
    • https://cdn.shopify.com/s/files/1/0432/8344/7968/files/pikigeridebu.pdf
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/selal.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/javascript_coin_flip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/62516087221.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_off00006270.bin
f1cac39c4c38c7a67fecb334d2e68ec63ded4ba81a0981749dd615e0e64abd8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6270 5384 bytes
font_01_sfnt_off00007484.bin
21b33fb4d6779225ed32a01d706fed834e12bdd69416bce66012a43f5e02cdc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7484 10128 bytes
font_02_sfnt_off0000973b.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x973B 4324 bytes

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