Malicious PDF — malware analysis report

Static analysis result for SHA-256 e399880952e04fe5…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 00:54:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63d06d33cad0cc3f7cb7a856e34de8f6 SHA-1: 215773874c22934c7536f16663986f589c6ba74b SHA-256: e399880952e04fe5d194aeaef263d3147b659778b8572aa84de61ecaa56b7a8a
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, many of which point to potentially malicious or unknown domains. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic, suggesting it's the primary lure. No scripts were extracted, but the presence of multiple embedded URLs and the redirector link strongly suggest a phishing or malware delivery attempt.

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=mathematical+reasoning+beginning+1+pdf
    • http://jinekot.bonavitapt.com/uploads/1/3/1/4/131406893/zufemonetewiwarugi.pdf
    • http://zupis.lwelcome.com/uploads/1/3/1/4/131406717/zumulazixuke_kudunaf_kizuguxixa_xefosolawaguzo.pdf
    • http://files.nickschumacher.org/uploads/1/3/0/7/130775334/temoxizasuwunav.pdf
    • http://kedenoxum.livejustwhatever.com/uploads/1/3/0/8/130873851/zasobipumonusifude.pdf
    • https://cdn.shopify.com/s/files/1/0437/5032/6421/files/69032429844.pdf
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/97948022047.pdf
    • https://cdn.shopify.com/s/files/1/0435/8003/1137/files/65836178831.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3660/files/convert_to_word_ocr_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/75833963269.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/71927147942.pdf
    • https://cdn.shopify.com/s/files/1/0435/8638/8136/files/nozumubi.pdf
    • https://cdn.shopify.com/s/files/1/0435/9464/5672/files/61689441812.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/9413559531.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/65628747911.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_off00006497.bin
ae41b11241b2eae93263de843e770ecc6d6fdd920e46db17dbc569c28d0c84c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5764 bytes
font_01_sfnt_off0000780c.bin
5652d9d1daf13eb2b7498bbc23ca0037a320cb61f321e327b6d336c40cccd343		 pdf-font-stream PDF embedded font (sfnt) at offset 0x780C 9756 bytes

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