Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0a4eb3e4e8e8ef…

MALICIOUS

PDF

46.2 KB Created: 2020-08-30 11:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d410882d54061046c04c35706e0968b2 SHA-1: af0d0c91d0abe9375798de94633143814d537e53 SHA-256: fb0a4eb3e4e8e8ef01bf998a758ca641a2cba7b90961534536815fc1b2f9f41c
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that appears to be a download for 'Civil engineering formulas pdf'. This link, however, redirects to a known malicious domain (ttraff.cc). The document also contains a large number of embedded links, many pointing to shopify.com, which is characteristic of SEO link farm abuse to mask malicious activity. The presence of a visual download button further supports the lure.

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/wix?keyword=civil+engineering+formulas+pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/chambal_kannada_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/lizonetidodetujedupazabev.pdf
    • https://cdn.shopify.com/s/files/1/0430/9359/0177/files/43011682037.pdf
    • https://static.usrfiles.com/ugd/8acad3_5ed71887fcb8475c80d183b5267bcb0a.pdf
    • https://static.usrfiles.com/ugd/625844_801a88f27fc442e3b6a07b047971fbe2.pdf
    • https://static.usrfiles.com/ugd/b8c837_90e518543667433cbb1d34ab83fc318a.pdf
    • https://static.usrfiles.com/ugd/b8c837_c6a9c76e23574a8d8e6dcfbed89c3fa2.pdf
    • https://static.usrfiles.com/ugd/538d67_6b43c6d1acd44d72bb0f483a02c681ca.pdf
    • https://cdn.shopify.com/s/files/1/0461/5189/3155/files/sawijoxadixagupuwusuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2174/6847/files/gomiroliriweded.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/punavubelibezuwujadisada.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/52874976686.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e88.bin
87ca911effcf9bb4e7417269fecc8f96bbf307f68184f9acee1a3fab22a36e48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E88 5248 bytes
font_01_sfnt_off00007046.bin
821bc5d1e7fdac04f7cf9e8a59c85e3c0e74036a0ddead66d1add771724ae602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7046 14652 bytes
font_02_sfnt_off00009dec.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DEC 4324 bytes

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