Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab5ac42f75a7e63…

MALICIOUS

PDF

51.4 KB Created: 2020-08-31 06:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c6d7f4e1dd8135487d7ed54dd1a3e26 SHA-1: 9289e2a63699225f6d424745cfd85a6a7b7b08a2 SHA-256: cab5ac42f75a7e63cb0c35c8868d31f88a3904065dddc0fc7f0e2f14339164cd
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though heavily obfuscated, contains references to the redirector URL and several other URLs hosted on Shopify. This suggests a campaign focused on redirecting users to malicious sites, potentially for phishing or malware distribution, leveraging SEO poisoning techniques.

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.cc/wix?keyword=amd770+northbridge+chipset
    • https://cdn.shopify.com/s/files/1/0440/3855/3765/files/hyperlipidemia_guideline_2018.pdf
    • https://cdn.shopify.com/s/files/1/0434/4404/3943/files/lulopelapobixive.pdf
    • https://cdn.shopify.com/s/files/1/0435/4949/1359/files/2017_ford_f150_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/42591034757.pdf
    • https://cdn.shopify.com/s/files/1/0431/5512/8480/files/demupo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/59243773586.pdf
    • https://cdn.shopify.com/s/files/1/0437/7640/9751/files/niwirifewabitatuparaxa.pdf
    • https://cdn.shopify.com/s/files/1/0448/0555/4337/files/nunanomad.pdf
    • https://cdn.shopify.com/s/files/1/0462/2788/2133/files/25407762329.pdf
    • https://cdn.shopify.com/s/files/1/0429/0324/0871/files/xelutebud.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2791/files/letumu.pdf
    • https://cdn.shopify.com/s/files/1/0433/2647/2345/files/low_carbon_steel_grades.pdf
    • https://cdn.shopify.com/s/files/1/0429/9846/4661/files/ruputo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7846/7222/files/80323265034.pdf
    • https://cdn.shopify.com/s/files/1/0429/1156/3932/files/33237257234.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/gate_2020_electrical_question_paper_with_solution_made_easy.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_off000087f3.bin
76590ccbd8a4999a3fa8b9d8c22116239e8aa1acad8fcf3b6d11a8181685d307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F3 5596 bytes
font_01_sfnt_off00009acc.bin
d59349124e4b66df9e4461513782d88f4cfaa4bee96e48a4b97cbce92e31763d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ACC 11200 bytes

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