Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ba5e1ec0453ad3…

MALICIOUS

PDF

46.8 KB Created: 2020-09-16 18:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15436368e9f71e0667f63bd175ff2ff6 SHA-1: 3616760c9a6803c0681a701500d5351349bb0c0e SHA-256: 78ba5e1ec0453ad3db619edb967c22cc888cb3bdf70587d3cf8634b6bd618e64
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=dragon+ball+z+final+stand+wiki+saiyan', likely leads to a malicious site. The document also contains a large number of embedded links, many of which are benign, but the presence of the malicious redirector is the primary indicator of compromise.

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.link/wix?keyword=dragon+ball+z+final+stand+wiki+saiyan
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://42668050-351e-4ede-9e29-d9e91a56cb55.filesusr.com/ugd/8a4248_70c581cc6bf54636b6cd17c4a6507a4f.pdf?index=true
    • https://40549e8b-d4cf-47dd-8d5f-09bae0db2662.filesusr.com/ugd/02af14_b33096185c014291a5b807b82bd8a597.pdf?index=true
    • https://3b0dbca5-b258-4445-877a-f8de4fac5f15.filesusr.com/ugd/8c0e65_5654f3e1e9e1438996d2e0f2896f8498.pdf?index=true
    • https://500617ff-15b4-42b6-9931-e3b1ef2769a8.filesusr.com/ugd/3bcfef_88c05c537214416c8b94248d9c7ec1b7.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/9901/2763/files/mitigilemululikaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/dibujo_arquitectonico_basico.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/77796111308.pdf
    • https://cdn.shopify.com/s/files/1/0431/8520/9512/files/algorithmen_und_datenstrukturen_die_grundwerkzeuge.pdf
    • https://cdn.shopify.com/s/files/1/0463/4286/5057/files/diferencia_entre_caida_libre_y_tiro.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/litofovivovir.pdf
    • https://fa62787e-346e-4dd5-9342-eaca4a817e43.filesusr.com/ugd/1e52da_03c3a3b53d984cee8236ab13f7dac765.pdf?index=true
    • https://e1dad806-b84a-4710-869f-79ad62085e20.filesusr.com/ugd/29c71c_5ce4c92e5abe42bb89516dcc886a26cb.pdf?index=true
    • https://ee87493f-4587-4948-80d9-06c8183028da.filesusr.com/ugd/8e66a5_3175097a0ac8472b8cf672bad9269d82.pdf?index=true
    • https://d45abef7-3600-4a5d-a770-f4d4eb1541fe.filesusr.com/ugd/45fd81_8157e404ba1847868a6d0f66d1a66d3f.pdf?index=true
    • https://d2fc18dd-71ef-45d9-96d1-dade9ecbc836.filesusr.com/ugd/d93890_0394417aa8ef42c59d0eec57afba5204.pdf?index=true
    • 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_off00006680.bin
0a903cc8ecd7d375a1ec66ca9f55fb925a10594c7698143db7f9a7ef4ef69160		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6680 4952 bytes
font_01_sfnt_off000077c3.bin
715077b5f1c926e4d57d5bb189c9e65c23ba229e8336ed28e6a85517e36b68bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77C3 5524 bytes
font_02_sfnt_off00008ac3.bin
692292d7b8f9ffdbb901b10534b20cced148d99a5d744044a38d7d84be699336		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AC3 10360 bytes

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