Malicious PDF — malware analysis report

Static analysis result for SHA-256 9330dc44b6965a93…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 12:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba85c655f7d32dedcb8ac081e4bb4a56 SHA-1: 9db054d6d1367f7dd36bebb5fdc1e1c5ef0bc652 SHA-256: 9330dc44b6965a938d306e3c618963ffdc65f0706f35ee6964fd853e8aaa83db
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The document body, though heavily obfuscated, contains the text 'Before he cheats sheet music pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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=before+he+cheats+sheet+music+pdf
    • http://files.mscykiert.com/uploads/1/3/1/4/131437074/nunegivekopibum.pdf
    • http://files.noahdbronstein.com/uploads/1/3/1/3/131398517/652845.pdf
    • http://dimukexiz.creativecardsandcrafts.com/uploads/1/3/1/6/131637649/fugopezixonifar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6561/files/remote_sensing_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/wopexobip.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/62028431565.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/moviebox_for_ios_10.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/45739424945.pdf
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/putidategarugelakiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/homeopathic_veterinary_medicine_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/21209915389.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6343/files/engineering_design_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/vixubitanub.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/rofibovonelumevawujowofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/3463/9522/files/digital_painting_tutorial_photoshop.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_off000061ea.bin
0bc3699e352279635b997582ea2c5be1c23d487dd0d65883e110e3c56c556197		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61EA 5412 bytes
font_01_sfnt_off00007429.bin
c54dc1e19a4df0ca6fcb41a48c34ea7ff941386834d4a2c08d07d1fe78731882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7429 10260 bytes

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