Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c02086c46212a8…

MALICIOUS

PDF

39.9 KB Created: 2020-08-23 11:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed0e1bfcbbe32286d4ec8298644f2ab5 SHA-1: 3527f96d930977be358052281fcc553eb1a7bb74 SHA-256: 44c02086c46212a894a8c40e436c6f3038897366ccb77f377538c15089e43f10
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed for SEO manipulation. This suggests the primary goal is to redirect users to malicious sites, likely for phishing or malware distribution.

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.ru/pify?keyword=funny+animated+video+song++mp4
    • http://kurow.martinsrestaurantcayucos.com/uploads/1/3/0/8/130815017/vivemasogula.pdf
    • http://files.angelababby.com/uploads/1/3/1/3/131384573/3090369.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/nadufixufupogafexanale.pdf
    • https://cdn.shopify.com/s/files/1/0440/5110/3894/files/30998350951.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0450/files/canon_picture_style_editor.pdf
    • https://cdn.shopify.com/s/files/1/0431/2825/8726/files/bipolar_disorder_type_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9550/7622/files/11860706463.pdf
    • https://cdn.shopify.com/s/files/1/0428/4874/7687/files/fresh_pasta_sheets_near_me.pdf
    • https://cdn.shopify.com/s/files/1/0437/7149/4554/files/kambikuttan_malayalam_cartoon_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/4304/2966/files/sairat_marathi_movies_free_hd_quality.pdf
    • https://cdn.shopify.com/s/files/1/0438/4122/4869/files/fur_elise_download.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_off00005e36.bin
268cf983d247017a927854d14caef9788c671fb378d1883797bff546c6ed3b9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 5356 bytes
font_01_sfnt_off00007077.bin
56e08f265b7672682e7e9b951798c14721270a61ba3b85f46a7a185c8be0d1f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7077 10192 bytes

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