Malicious PDF — malware analysis report

Static analysis result for SHA-256 b38c034510348564…

MALICIOUS

PDF

41.1 KB Created: 2020-08-30 05:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f84f0ff3c55cf66608e50a282912d7 SHA-1: fc78d74d1adf54d8874e1ea7c81bccfc66ed4f62 SHA-256: b38c03451034856490d7245e33e96e477aa40f64d8b3bbf2e3e37fe65a59f443
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body text, though heavily obfuscated, contains a URL that leads to a known malicious redirector. This suggests the document is designed to trick users into visiting malicious websites, likely for phishing or malware distribution.

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=mba+thesis+topics+in+accounting+and+finance
    • https://static.usrfiles.com/ugd/b8c837_083492c2e89a4c3b96d5e0ab96b34c90.pdf
    • https://static.usrfiles.com/ugd/b8c837_e80f3863e9394ff49499568e03ae0785.pdf
    • https://static.usrfiles.com/ugd/a298ce_a247c8e7b5d8407782dcc51f324007e9.pdf
    • https://static.usrfiles.com/ugd/0adedf_36f0922b1c9c413197e0ffabd1745a14.pdf
    • https://static.usrfiles.com/ugd/c8a981_748b7376123a471cb1673d02cdeff0a7.pdf
    • https://cdn.shopify.com/s/files/1/0438/0491/7917/files/adp_time_and_attendance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3804/files/38970797506.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/44329764907.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/zexutijuwudozileja.pdf
    • https://cdn.shopify.com/s/files/1/0434/3378/7542/files/cardiothoracic_surgery_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/vowidawatuwigi.pdf
    • https://cdn.shopify.com/s/files/1/0460/2999/6191/files/73679500766.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/marpol_annexes_1_6.pdf
    • https://cdn.shopify.com/s/files/1/0433/5176/9247/files/2015473234.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/android_auto_video_without_root.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_off00006361.bin
2957fe0a1ce460a5b2230130a34cc49f522ed0b0e69b5f6dcf303fdfda752fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6361 5432 bytes
font_01_sfnt_off000075de.bin
1aae9b8091037edf679ada7691fcaf509dce99e1d2bbfd68fe285608183871bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DE 9896 bytes

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