Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc0213ee7c70b3e…

MALICIOUS

PDF

45.4 KB Created: 2020-08-06 07:19:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0947284a3e836e19ce57c2255fec7ae SHA-1: 5c7dce43cd8cd9d4f45f7045247f4cfc2afbcd3a SHA-256: 7cc0213ee7c70b3ec849d9652ffe37b57665f713c435de6f3e1bc454249bab2f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=scones+recipe+book+pdf'. The document body, though heavily obfuscated, contains text related to 'scones recipe book pdf', suggesting a lure. The ML classifier strongly indicated maliciousness, and the presence of many external PDF links points to a link farm or distribution mechanism.

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=scones+recipe+book+pdf
    • http://mojiz.imperialphotojkt.com/uploads/1/3/1/4/131407005/7889855.pdf
    • http://files.lenorekennedy.com/uploads/1/3/0/7/130740193/zugolagaruga_ravotenokage_wekutofaxesu_setoxexeberi.pdf
    • http://files.valkrieshopgoddess.com/uploads/1/3/0/8/130873997/suwegexomaz.pdf
    • http://files.codeblackatl.com/uploads/1/3/0/7/130776781/depadeg_refodujadabe_tuserupizute_vufaf.pdf
    • http://files.planmyjourneys.com/uploads/1/3/1/4/131453494/1587123.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/36826305797.pdf
    • https://cdn.shopify.com/s/files/1/0433/0160/1444/files/6369875182.pdf
    • https://cdn.shopify.com/s/files/1/0428/4956/6886/files/gamurivugunuwazag.pdf
    • https://cdn.shopify.com/s/files/1/0447/1989/8777/files/media_query_for_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2661/files/tosani.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1229/files/83206200483.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/kawibavosobif.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/81939582606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9092/0099/files/borigonirofumupavupamokag.pdf
    • https://cdn.shopify.com/s/files/1/0440/7571/2664/files/aquatic_ecology_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/nuzivuvarawu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006bb2.bin
f07f43daf733c9ab804dd4e26097098a95f25081b6aa2f9da11688e62c878253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BB2 5216 bytes
font_01_sfnt_off00007d77.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D77 1800 bytes
font_02_sfnt_off00008604.bin
bb91dbc3e796323251f969f8e9cfb2f5b334386609262fe89ba5b71b4a8cbd2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8604 10160 bytes

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