Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf44d9d27b0121a…

MALICIOUS

PDF

42.2 KB Created: 2020-08-16 00:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3db07343646f51b8bbc205ff509d5547 SHA-1: 7380cc6c589c210e8dd650f7ea2c7760d540c4e8 SHA-256: bdf44d9d27b0121a56129edc504a631b43c327ace459c9eef3f027ead399e40f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=whatsapp++free+for+pc+windows+7', suggests a lure for downloading software. The document body, though partially corrupted, contains text related to 'Whatsapp free for pc windows 7', reinforcing the phishing pretext. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation to drive traffic to malicious sites.

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=whatsapp++free+for+pc+windows+7
    • http://files.mikeshieldsphotography.com/uploads/1/3/1/6/131607163/028b67d2e394.pdf
    • http://files.i9studios.in/uploads/1/3/2/6/132681851/982d77528f4ba0f.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/60041729697.pdf
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/time_calculator_ps4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0708/1630/files/flow_cytometry_a_practical_approach.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8573/files/github_lines_of_code.pdf
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/gisuzug.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/mulixamaziwofazosodutaf.pdf
    • https://cdn.shopify.com/s/files/1/0447/7698/0629/files/lesapevone.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/graphic_design_cover_letters_stand_out.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/savopetug.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/22479982647.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_off00005f20.bin
2fcbcfe4da6cfb6ca3761a1149fbb13981555b1b7aaa715b1c6fc131cf152a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F20 5396 bytes
font_01_sfnt_off00007198.bin
dcc369a68ad67a0de587cbeedc373da0f3f58c9113eeea4fc50084f841f68765		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 13336 bytes

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