Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5ebfbd2e580290…

MALICIOUS

PDF

49.3 KB Created: 2020-08-30 09:27:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab3401a0aa1ab4f4f4e78d16f2515106 SHA-1: a592d87dce1c108d5314f717e94a774cc3fc5ed9 SHA-256: 2e5ebfbd2e58029043fb2fdcb8d5bddd48b06746d1d7489f9fcfea090f2d722a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=dsdm+atern+project+approach+question'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the highest concentration hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text fragments and the malicious URL, reinforcing the lure. 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/wix?keyword=dsdm+atern+project+approach+question
    • https://cdn.shopify.com/s/files/1/0439/9503/7854/files/25974922520.pdf
    • https://cdn.shopify.com/s/files/1/0430/3542/6970/files/zeselatojenipuvuvog.pdf
    • https://cdn.shopify.com/s/files/1/0429/3859/7539/files/zikoredemufo.pdf
    • https://static.usrfiles.com/ugd/b8c837_c984c48df95d4e6a9a68e1b456226d62.pdf
    • https://cdn.shopify.com/s/files/1/0449/5376/3999/files/bipazirovawidopiwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/65682750035.pdf
    • https://cdn.shopify.com/s/files/1/0430/4932/0610/files/jidem.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/clear_cache_google_chrome_android_tablet.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/66623420055.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/45945320601.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/muloze.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_off0000835a.bin
87b137e7599f33cd8b83e21ae54178b5c62afbe327ebd75053350f0b19b9491c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 5484 bytes
font_01_sfnt_off000095d2.bin
e41a064bc5b2898f854fcd5e018b74e7dc2a7a47b07f09c6e6acc88f655a0b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D2 10080 bytes

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