Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f0f3f9aaf203a03…

MALICIOUS

PDF

36.0 KB Created: 2020-08-13 03:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7888e53d2a3334950aa0e06d2a22777 SHA-1: 33315eb590cd99899963e36f840a92381bfbb7b3 SHA-256: 0f0f3f9aaf203a03b2f21a9d7f4b4f587b3a5542fca7f0de62c6ab9206e1407c
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one identified as a malicious redirector. The document body includes a call-to-action phrase, suggesting a lure to click the malicious link. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cessna+172+pilot+operating+handbook+pdf
    • http://janeke.adrianpeterson3.com/uploads/1/3/2/6/132695924/8745637.pdf
    • http://ritalofun.leiden-united.com/uploads/1/3/1/6/131636725/5264400.pdf
    • http://files.rizqankareem.com/uploads/1/3/0/9/130969428/vapudaro.pdf
    • http://zuwasumol.adagencyvaluations.net/uploads/1/3/1/4/131453177/fipipis-lepezovurujis-boxod-voronufivefemo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/2658/6520/files/vosidamewepirijaxim.pdf
    • https://cdn.shopify.com/s/files/1/0429/2388/4711/files/serujivogimaxe.pdf
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/jozot.pdf
    • https://cdn.shopify.com/s/files/1/0438/0521/2832/files/adoption_papers_texas.pdf
    • https://cdn.shopify.com/s/files/1/0437/5163/7141/files/46834251513.pdf
    • https://cdn.shopify.com/s/files/1/0431/2583/3884/files/wafelejezagame.pdf
    • https://cdn.shopify.com/s/files/1/0434/5105/6295/files/cambridge_pet_2.pdf
    • https://cdn.shopify.com/s/files/1/0429/5471/9395/files/65825847360.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/vufuxilejitivilufukiri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunazazaxukatokezidabu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/78856957221.pdf
    • https://cdn.shopify.com/s/files/1/0428/0611/6511/files/wukatujemeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/dazilozobopadoxewad.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/ropatuseratipuke.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_off0000453a.bin
2bb38ac86f5ab70fa42faa0f4d7a1dd9bfb646cf40b6adba02270b989968af7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x453A 5584 bytes
font_01_sfnt_off0000582e.bin
bff67b8dbb81259f9cd64a2b12a68d9bcd52b790241d2f3122d8190ccdec119a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x582E 8268 bytes
font_02_sfnt_off00007490.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7490 4324 bytes

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