Malicious PDF — malware analysis report

Static analysis result for SHA-256 60865cb24c772446…

MALICIOUS

PDF

38.3 KB Created: 2020-08-08 16:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce8f6598ba3b4d63376a895b740afc4c SHA-1: b82e190a299c3007adc62b09e1c2aab92ea30374 SHA-256: 60865cb24c772446a57746f7ec3624e7784e1cb84e40e3bd50e966236746de0d
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, ttraff.cc, disguised as a project report. It also features a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the embedded URLs are the primary indicators 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.cc/pify?keyword=biomass+briquettes+project+report+pdf
    • http://suxesu.wbmconference.net/uploads/1/3/1/3/131383544/rupoxelesim.pdf
    • http://files.whipty-do.com/uploads/1/3/0/8/130813054/637556.pdf
    • http://files.chasenigleheart.com/uploads/1/3/1/4/131482999/jezipen.pdf
    • http://files.theshirehomestead.com/uploads/1/3/2/7/132740285/mujerejaba-rububozipodeda-vaxite-mevizezixosili.pdf
    • http://files.researchjunction.net/uploads/1/3/1/6/131606289/9255517.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0430/9847/2605/files/defakeridiwaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/livro_de_carlos_alberto_brilhante_ustra.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/alimentos_con_yodo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6547/5229/files/32260107847.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/medolevifedixapat.pdf
    • https://cdn.shopify.com/s/files/1/0437/3718/6453/files/sifujoxaxokuzojegojupas.pdf
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/jspdf_autotable_footer.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/31970336691.pdf
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/wijilefituzonabijiviluz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/causes_of_peptic_ulcer_disease.pdf
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/sedevuzosulapevasopiwugas.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_off0000575e.bin
c3d85473b1bf31866b859bf427b1dba44318c676da29c23506aa161d3e1ac7a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x575E 5660 bytes
font_01_sfnt_off00006a7c.bin
29534a16c3d139e0998e78c9faa614d7d22b1b0e188b75b11ec5b54a20d89ce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7C 9764 bytes

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