Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e81c896041d6f4…

MALICIOUS

PDF

40.7 KB Created: 2020-08-22 04:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13bdb9f29d1313b4972879211aa3b5c1 SHA-1: 950d5f2e595e65d61f4cfc50e4cd113eff5ebf0b SHA-256: 80e81c896041d6f48f54cb77053c2dcd3ac9d17672148cc81a178267a8ac696a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector. The document body, though heavily obfuscated, also contains the malicious URL. This suggests the primary purpose is to lure users to malicious infrastructure, likely for phishing or malware delivery.

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=assets+android+imageview
    • http://negagu.genpromotion.nl/uploads/1/3/0/7/130740117/600100221f.pdf
    • http://wuxuk.marineoasis.com/uploads/1/3/2/7/132740978/1942963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0826/2297/files/calcined_clays_for_sustainable_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0435/7970/3451/files/62021804838.pdf
    • https://cdn.shopify.com/s/files/1/0445/6900/2143/files/69826991862.pdf
    • https://cdn.shopify.com/s/files/1/0430/1455/3763/files/wetodezuborosadumutasuj.pdf
    • https://cdn.shopify.com/s/files/1/0436/2797/0718/files/7158120232.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5018/files/40210836289.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/rofavigexivava.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/novela_amor_de_invierno.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_off00005426.bin
865c7d127437c7072ede64b3d0e6e03dbbea43751eb631f16c3d6c489d361139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5426 5256 bytes
font_01_sfnt_off000065fd.bin
123beaad9d35dd5af838ee85fda755de96f385eac17f0c4e396d036fc710f684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65FD 15336 bytes

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