Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e35510c696480e9…

MALICIOUS

PDF

68.4 KB Created: 2020-09-02 13:53:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07261de19d377d87c1078fcc603b3f1d SHA-1: 7e0037a55a588b96ac7bffd8715eb69a1662d592 SHA-256: 4e35510c696480e91856ea77ac062b90e66e58f75514202a02b96ce14922594e
150 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate research papers, but ultimately redirects to a malicious URL. The primary malicious link is https://ttraff.me/wix?keyword=biomedical+engineering+projects+pdf, which is a known malicious redirector. The document body is heavily obfuscated and contains embedded URLs, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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/wix?keyword=biomedical+engineering+projects+pdf
    • https://cdn.shopify.com/s/files/1/0454/3709/1998/files/islamic_banking_in_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7345/files/nixuboj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2618/files/13964741728.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/maa_durga_bhajan_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0431/5434/2042/files/jaluxekogelin.pdf
    • https://cdn.shopify.com/s/files/1/0428/1729/0407/files/jowafegisexudewukuxobeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/morufak.pdf
    • https://cdn.shopify.com/s/files/1/0433/5550/4795/files/kisuranalapapumemegoviv.pdf
    • https://cdn.shopify.com/s/files/1/0431/5247/4267/files/5162590417.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/13836688767.pdf
    • https://cdn.shopify.com/s/files/1/0430/6019/9573/files/fisokuwesevebusebotixije.pdf
    • https://cdn.shopify.com/s/files/1/0434/9214/7366/files/diagnosis_banding_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0429/7339/7145/files/44493113547.pdf
    • https://cdn.shopify.com/s/files/1/0462/6451/6757/files/xewepavufutebelofapitolu.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/dojimorusu.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_off0000cd34.bin
d21dd575244be8c1387a58dd97dbde9b15dfa42763f624fda21dfc46bd9a9cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD34 5600 bytes
font_01_sfnt_off0000e02d.bin
8f137fda6ceba40c190cd228a8107ebcdf1a9427a70fa2f59edc046484b58119		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 10640 bytes

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