Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5f2aff5766c9b8…

MALICIOUS

PDF

45.6 KB Created: 2020-08-03 15:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d13c1ab5c9105135f382d0075ee921b SHA-1: 46d972f94db8ad784bc5915b3911aa3d4ddc290b SHA-256: ab5f2aff5766c9b87200d2ee9ddbc5b600bb2c2e427cbfb30f546cf2cdd42197
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though partially corrupted, contains text related to academic material and the malicious URL. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

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/pify?keyword=quimica+inorganica+catherine+housecroft+pdf+download+portugu%25C3%25AAs
    • http://bofesos.basketballjerseys.ca/uploads/1/3/0/7/130775195/wumuvurapo-nizujifiguxazow-binalefavijal-tevulabababan.pdf
    • http://files.healingvaccineinjuries.com/uploads/1/3/0/8/130874253/motofivenur.pdf
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/0/8/130813797/fivepeno.pdf
    • https://cdn.shopify.com/s/files/1/0439/8976/2206/files/xabusibuwunumudiwul.pdf
    • https://cdn.shopify.com/s/files/1/0429/9243/5359/files/rich_gang_lifestyle_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/4361/8965/files/2106293828.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/7360657679.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/5675708205.pdf
    • https://cdn.shopify.com/s/files/1/0439/3756/2779/files/luvafuvad.pdf
    • https://cdn.shopify.com/s/files/1/0435/2137/6410/files/zipumefi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0433/2149/1621/files/17690066271.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/zadorelozigaligotibivi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1676/5088/files/88208297011.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_off00006e1d.bin
8f1ea28c16d8d70ded9c22d54e0b3621ddc3431542a7121723c6752d0f45ae98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E1D 5872 bytes
font_01_sfnt_off000081c0.bin
f8f3ec0dbc7f13af7cc2462ca1607002240a5b0a6d14042de3e32a6df00ec388		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C0 10700 bytes

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