Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3339666b84973e…

MALICIOUS

PDF

56.8 KB Created: 2020-08-13 21:59:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85441397c5fd60c18f32cacf443847b1 SHA-1: 0e984f2a56e88da5d2cc9a183f382c96451609c4 SHA-256: 6c3339666b84973e9e823a322bd138a7ba14c5b2ab7b5f5b37b6d8af0b7b8020
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains a URL that aligns with the malicious redirector heuristic, suggesting an attempt to direct users to harmful content.

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.cc/pify?keyword=telugu+wap+movies+2018++3gp
    • http://sonudubez.the-learning-agency-lab.com/uploads/1/3/0/7/130775162/0407e3ffa093e6b.pdf
    • http://files.ivoryoungequine.com/uploads/1/3/0/7/130740165/b0841e82d66f2.pdf
    • http://files.thesainttrainer.com/uploads/1/3/0/7/130738822/6471597.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/1238/2117/files/79669628316.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/homemade_adderall_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/31871454370.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/jejiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/3680/2204/files/statin_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/cs_lewis_the_weight_of_glory.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/personality_meaning_and_nature.pdf
    • https://cdn.shopify.com/s/files/1/0448/6791/1842/files/dieta_aumento_de_masa_muscular.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000ac3a.bin
201a7b7cb446722f809e96d9d7171ba4a856e3a9ce3fdd2cd853417d51309f5b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAC3A 17460 bytes
font_00_sfnt_off0000558e.bin
f47b20eaf916122b970a72c462ff910b51e004a1c0c1a03eba40af420af44742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558E 8800 bytes
font_01_sfnt_off000072b9.bin
2431c235af56a3c59fa4878b34757f76b5d2486c80774cf6eb471c7b649555d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72B9 5828 bytes
font_02_sfnt_off0000869f.bin
2a70b72fbbb74f8c8310bd0d7467a5158fe7aa171b6c674a54c2eb37e00c33d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869F 10932 bytes
font_04_sfnt_off0000c649.bin
c814523a46037333162bfea5844c0baf96a630b7d0913775e02dfac3ef78065d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC649 3552 bytes

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