Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b60d6a6e345ec37…

MALICIOUS

PDF

49.3 KB Created: 2020-08-01 10:28:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2dc6ce121b341d10332a30b1a173c73 SHA-1: ee2f4032fe70d411470c30150840d964f19b67e6 SHA-256: 7b60d6a6e345ec377cfb92734981dad342b83a93b010df3fbb88f0d00c85cdc9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the URL 'https://ttraff.cc/pify?keyword=ibm+vision+statements', which is a critical finding. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, including one pointing to 'https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sinasonabufubujuruzemefis.pdf', suggesting a broad distribution attempt.

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=ibm+vision+statements
    • http://files.valutazioni-gioielli.com/uploads/1/3/1/6/131636988/derazop_zotaroganekokap.pdf
    • http://files.consciousjourney.ca/uploads/1/3/1/4/131452842/zawinezefim-bepemaj.pdf
    • http://files.modernvoguephotography.com/uploads/1/3/1/3/131380546/a45ddd565.pdf
    • http://files.eastafricanscholarsfund.org/uploads/1/3/1/6/131606968/dafixuxozonono-foxidi-xinatajejed-poloxokawuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/sinasonabufubujuruzemefis.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/nawebexibo.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/95574332872.pdf
    • https://cdn.shopify.com/s/files/1/0434/9054/1733/files/99111482495.pdf
    • https://cdn.shopify.com/s/files/1/0431/6971/0242/files/siduloruxu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/39229755980.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/xujudolumuvir.pdf
    • https://cdn.shopify.com/s/files/1/0434/5013/8784/files/67289150518.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/ziduw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6119/9526/files/53958118340.pdf
    • https://cdn.shopify.com/s/files/1/0433/4678/8501/files/98694315938.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/44647428009.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083e9.bin
38ec72c48c4c1914ae18f64881cd74dbccb36451d0ccfeb8f683abf7741b8191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 4840 bytes
font_01_sfnt_off00009452.bin
75e07f11f2535f34bc3849aa6751f04c680e27ac805a3240431439c26dd599d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9452 10592 bytes

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