Malicious PDF — malware analysis report

Static analysis result for SHA-256 934553de4cdad91d…

MALICIOUS

PDF

33.8 KB Created: 2020-08-14 19:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c41a1f3f98d8acdd89e668476116312 SHA-1: b256bdb22cfa02165506c5f2867a34f7659e4d59 SHA-256: 934553de4cdad91de197939fa53ca55a031598413572cd4456cd4826f21f5b27
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the embedded URLs, 'https://ttraff.com/pify?keyword=sharechat+app++in+telugu+dj', is identified as a malicious redirector. Another URL, 'https://cdn.shopify.com/s/files/1/0435/3051/8679/files/munaxot.pdf', is the first in a list of 13 PDF links, suggesting a link farm strategy. The document body itself is heavily obfuscated and contains the malicious redirector URL.

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=sharechat+app++in+telugu+dj
    • http://files.kernellee2kettlecorn.com/uploads/1/3/1/8/131872032/posezivukigup.pdf
    • http://files.plateauenglish.org/uploads/1/3/0/7/130775441/6832540.pdf
    • https://cdn.shopify.com/s/files/1/0435/3051/8679/files/munaxot.pdf
    • https://cdn.shopify.com/s/files/1/0431/7747/6260/files/nafuxofovubiboginupan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/tuzexak.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5423/files/nomalogidazeniteni.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1646/files/bio_data_form_for_marriage_pdf_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5461/2123/files/fanomoburawokuwojug.pdf
    • https://cdn.shopify.com/s/files/1/0436/0824/4381/files/strategic_management_book_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/big_brother_after_dark.pdf
    • https://cdn.shopify.com/s/files/1/0436/3950/5054/files/beautiful_nature_videos_with_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/3774/4552/files/senodapalediruwek.pdf
    • https://cdn.shopify.com/s/files/1/0432/6660/5219/files/retail_marketing_book_by_dr._l._natarajan_download.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_off000047d5.bin
bfeef7adeb7ff878df122ee25b54444f52d668d69fa5d98ef7d8e7a68845520c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47D5 5336 bytes
font_01_sfnt_off000059ec.bin
4de17cc94d5c0a109aaf7b0874f6d189a0a5d3ee897ec54a4bd671cf44a5af79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59EC 9540 bytes

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