Malicious PDF — malware analysis report

Static analysis result for SHA-256 47abc503b97724fe…

MALICIOUS

PDF

72.2 KB Created: 2020-09-02 22:32:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 032ca390c66dcf6155a827e23c74d41f SHA-1: bcec8d68081c610dca44694c19405eecd1b5b324 SHA-256: 47abc503b97724fe9d2ea7525ea77c0ad6d0badeeb69d50d3f7488cb26e638ba
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/pify?keyword=hydralazine+hydrochloride+davis+pdf', which is also flagged as malicious. The presence of a large number of external PDF links, many pointing to Shopify, suggests a link farm or SEO poisoning attempt to drive traffic to the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/pify?keyword=hydralazine+hydrochloride+davis+pdf
    • https://cdn.shopify.com/s/files/1/0438/5705/1808/files/hurst_review_files.pdf
    • https://cdn.shopify.com/s/files/1/0436/5372/6358/files/39958133741.pdf
    • https://cdn.shopify.com/s/files/1/0460/0148/8039/files/98083847753.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/guxalagovezemama.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/xeturozavawe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4986/8703/files/thyroid_orbitopathy_treatment_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/30425941185.pdf
    • https://cdn.shopify.com/s/files/1/0434/5918/2745/files/56540341634.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_4dea7a37f3c64e76bdf07210a70d4551.pdf
    • https://static.usrfiles.com/ugd/ed64d2_0f437471f7844612ba99039091780a50.pdf
    • https://cdn.shopify.com/s/files/1/0437/4147/9066/files/89339659024.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/86270563319.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/67768466545.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/jidokosewen.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_off0000d987.bin
c123a93b7cef6ff817a4a409d8a1585a222a4ba0f6dba81b55415cb00e8780d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5416 bytes
font_01_sfnt_off0000ec00.bin
983fdd51048b6bf22f8fe739af5ab9eb4b1f245989753f51ab47498ed1567f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 12004 bytes

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