Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b8ba57e3207273…

MALICIOUS

PDF

51.7 KB Created: 2020-08-11 02:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b546e11b074710c8f7ccd1c1378a373 SHA-1: d60f993260d84eb75fe9cef678f990431e5a675e SHA-256: a8b8ba57e3207273b8ed85d52062c25a91b29e65e7afa048b37b33672ef90e37
128 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.cc/wb?keyword=asme%20a17.1%20free%20download%20pdf'. This indicates the document's primary purpose is to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic was triggered, suggesting a broad distribution effort. The presence of a 'download' button lure further supports a malicious intent to trick users into clicking through to malicious sites.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=asme%20a17.1%20free%20download%20pdf
    • http://files.ttphotovideo.com/uploads/1/3/1/3/131378899/fb16f04f43eb.pdf
    • http://files.joshuagillingham.ca/uploads/1/3/1/6/131606094/wegepufiwodirasoxen.pdf
    • http://files.awesomekidmin.com/uploads/1/3/0/7/130775503/574393.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0984/files/80583209255.pdf
    • https://cdn.shopify.com/s/files/1/0428/5313/8591/files/87573477368.pdf
    • https://cdn.shopify.com/s/files/1/0434/1999/2222/files/57994455111.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/maplestory_soul_enchanter.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2455/files/business_statistics_2nd_edition_donnelly.pdf
    • https://cdn.shopify.com/s/files/1/0430/1986/2179/files/84093815552.pdf
    • https://cdn.shopify.com/s/files/1/0441/0051/8040/files/fafozuxovepufez.pdf
    • https://cdn.shopify.com/s/files/1/0434/3103/5047/files/public_administration_and_disaster_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/canon_600d_user_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6623/6826/files/kalasagukowafun.pdf
    • https://cdn.shopify.com/s/files/1/0429/0458/4355/files/vusakojagikuxuki.pdf
    • https://cdn.shopify.com/s/files/1/0431/1033/4620/files/64948548445.pdf
    • https://cdn.shopify.com/s/files/1/0434/3532/7653/files/30597861998.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/2724745765.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd8.bin
40502e45839a255fec5fe34643b4baab05cb1e0deba5bed50ffa21d455099fe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 5092 bytes
font_01_sfnt_off00007126.bin
501f160ec28e6c4779f1ec89190221f6982b668e91b7844ba69c75f7152108a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7126 14324 bytes
font_02_sfnt_off00009e0a.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E0A 16204 bytes
font_03_sfnt_off0000b338.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB338 4324 bytes

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