Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdb2513598c45fc…

MALICIOUS

PDF

52.9 KB Created: 2020-08-06 05:25:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 988cae9a42e2093d73ecb64a7edf5611 SHA-1: 5ea6acaf225ecad01c773e7390d2c9a21af2c3d7 SHA-256: 5cdb2513598c45fcf0378fceaced2f33f6e0bd50ce50234d14f13dae57b24b4e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, https://ttraff.com/pify?keyword=copernican+revolution+thomas+kuhn+pdf, is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites.

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=copernican+revolution+thomas+kuhn+pdf
    • http://masibado.treadweary.com/uploads/1/3/2/6/132681947/setafab.pdf
    • http://fupala.brightonbannershop.co.uk/uploads/1/3/1/4/131453109/7155503.pdf
    • http://tadipasid.godlybrandinc.com/uploads/1/3/2/6/132681824/devanizaji.pdf
    • http://files.gregbgordon.com/uploads/1/3/1/0/131070786/vuvirivugixut_parapom.pdf
    • http://files.portabletoiletsmichigan.com/uploads/1/3/0/7/130775304/3ed70.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3046/3142/files/68525431035.pdf
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/biotecnologia_animal_y_vegetal.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/32897570410.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/form_g-_325a.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/wikuvebala.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/il_barbiere_di_siviglia_libretto.pdf
    • https://cdn.shopify.com/s/files/1/0432/1561/8203/files/10643749017.pdf
    • https://cdn.shopify.com/s/files/1/0436/5221/9030/files/alphabetical_series.pdf
    • https://cdn.shopify.com/s/files/1/0432/4697/7179/files/gepimikavokibepoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/8411/1267/files/resident_evil_degeneration_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/9899907028.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8734/files/12th_zoology_practical_manual_2020.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_off00009172.bin
b4091c521e467a9c196154940e357b2622052697be3b728c7b29f8d6637363f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9172 5424 bytes
font_01_sfnt_off0000a3b3.bin
52d290e8e302f9f2f301e72c6651ae35f5b435655370111701900e553b1248df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B3 10076 bytes

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