Malicious PDF — malware analysis report

Static analysis result for SHA-256 b383f5254613582f…

MALICIOUS

PDF

40.7 KB Created: 2020-08-20 07:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a785ef14d90aef8002a7b45fad13da6 SHA-1: 34dca47f517b439fb0eec26b6eb3e10d2811222c SHA-256: b383f5254613582f598c16d45c78e17ceca8e9216d82f70f62af73b008ee56a2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to 'game alien shooter offline' and the malicious URL, suggesting a lure to download or access malicious content. The ML classifier also strongly indicated maliciousness.

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=game+alien+shooter+offline+untuk+laptop
    • http://files.hollisguitars.com/uploads/1/3/2/3/132302780/rezonitasoxotewawuw.pdf
    • http://files.kinglenservices.com/uploads/1/3/2/6/132695325/navejojiririre.pdf
    • http://files.landscapeservicenassaucounty.com/uploads/1/3/0/7/130775229/a82743db68.pdf
    • http://files.harrywaltherband.net/uploads/1/3/0/8/130813108/1518052.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/imdb_parents_guide_hustlers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2270/5063/files/nimodipine_subarachnoid_hemorrhage.pdf
    • https://cdn.shopify.com/s/files/1/0432/7371/5880/files/password_codashop_pro.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/remafevedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/sibonomavi.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/66935815612.pdf
    • https://cdn.shopify.com/s/files/1/0437/0356/6486/files/27302747805.pdf
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/whatsapp_apk_mirror_2._12._194.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/cammino_di_santiago_in_bici_tappe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/vowexusuforediriraburedom.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6863/files/gekufad.pdf
    • https://cdn.shopify.com/s/files/1/0432/4756/7010/files/jutixiwuturutedulikumev.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/wordly_wise_3000_book_8_lesson_6_answer_key.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006232.bin
2377398e6e1902176c0c1fdb573d50ca749cd0895b2d7f3b55f151c9d32102b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6232 5236 bytes
font_01_sfnt_off000073da.bin
d29feff5d3673c5faa51d7fd11b519a90a5ae1b9296721a149d94cc3f52384ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73DA 10240 bytes

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