Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd364726c7d27e41…

MALICIOUS

PDF

40.6 KB Created: 2020-08-20 08:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4420567b6c7b8b0ccec0e472b65daf1 SHA-1: 8593cb79c8e1e58b42d39e5db2126a77d9782be6 SHA-256: dd364726c7d27e41f11d25dd58f9b5f98918b198ad6e0034c0b5d6e325183ba8
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL found in the malicious link heuristic. This suggests the PDF's primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing. No scripts were extracted from this sample.

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.com/pify?keyword=finishing+sheetrock+around+shower
    • http://files.mycolorpainting.com/uploads/1/3/1/4/131437308/7712050.pdf
    • http://files.sheltercoveartsrecreation.com/uploads/1/3/1/8/131856079/kukilix-dapuwiwaderate-fafibed.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/al_quran_with_urdu_translation_in_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/mibiwetadunifogemebav.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/sotikowofupevutinezasa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3174/9031/files/vijonenuzarutegiwanar.pdf
    • https://cdn.shopify.com/s/files/1/0434/5682/3462/files/dutulodevubajegajufiz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/26038537490.pdf
    • https://cdn.shopify.com/s/files/1/0439/4926/0968/files/madenikaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/matikegikisenezonus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/list_of_adjectives_to_describe_food.pdf
    • https://cdn.shopify.com/s/files/1/0437/6965/9549/files/gulf_of_mexico_fish_identification.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_off00005f9d.bin
77f6ff13be9d6f58892ad0b02b52622e217f2c0773fe454a609bd5df8fbec9ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9D 5280 bytes
font_01_sfnt_off00007197.bin
965eed037222b17379745270d567216351432dce86a49ef2b50e9173af227856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7197 10892 bytes

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