Malicious PDF — malware analysis report

Static analysis result for SHA-256 195c1f59d1c79a2a…

MALICIOUS

PDF

41.5 KB Created: 2020-08-13 22:47:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b396f44a0ad66529bdc10e365a9ea9c5 SHA-1: 4b50d3265f2a9c169689d73f9da9b26111c561a1 SHA-256: 195c1f59d1c79a2a9aa637e723dd28a89cb8984124053df486b17b5f00362e11
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, disguised as a drum sheet PDF. This redirector likely leads to further malicious content or malware download. The ML classifier strongly supports the malicious nature of this PDF, and the presence of numerous external PDF links suggests a link farm used for SEO poisoning or distributing malicious 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=here+i+go+again+drum+sheet+pdf
    • http://files.walkamilebrainerdbaxter.com/uploads/1/3/2/6/132682813/rojivolep_vapudofezokem.pdf
    • http://files.mnpeo.org/uploads/1/3/0/9/130969758/tiwexavajedije.pdf
    • http://files.longlakehounds.com/uploads/1/3/1/4/131438188/41f1021ff76.pdf
    • http://files.lindseymcnaughton.com/uploads/1/3/0/7/130775049/miruroworosib.pdf
    • http://wivoke.paradiseprintsfashion.com/uploads/1/3/1/3/131383791/disil-kapawiwusidi-gaduditur.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/xabuzajegabatetewapawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0213/4681/files/datation_carbone_14_exercice_corrig.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/febisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/3279/6574/files/65525239129.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/zend_avesta_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/3458/1911/files/tobira_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0430/5852/8405/files/47999302060.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9484/files/marathi_calendar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/5356/4583/files/paxaporejosuke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7116/8931/files/72415714218.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/volebuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6789/2131/files/42687910337.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0432/2187/6899/files/31500743108.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_off00005896.bin
639fe9000a95ee798cbb9788862e70324a8cfe8e75f71a958dae1d9d38607e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5896 5384 bytes
font_01_sfnt_off00006ab4.bin
45070b6589aadc14b97f76b5919fccbf513d56f942ee9c6082864901630ee78c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB4 14856 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.