Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0b843bf495cbba…

MALICIOUS

PDF

43.1 KB Created: 2020-08-12 05:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d8a5e26ce9a62ac8f1a2f102cedbda SHA-1: ef4a48701b6cec5ca4694cc8198281c7e0adad02 SHA-256: ce0b843bf495cbba17f5f08c3b89430fb81e5d2989e0f72a48d1511d32491671
150 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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=pdf+to+word+converter+software+with+crack', is designed to lure users by promising a PDF to word converter. The presence of numerous other links, many pointing to Shopify domains, suggests a link farm intended to improve SEO for malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=pdf+to+word+converter+software+with+crack
    • http://files.churrosychocolateinc.com/uploads/1/3/1/0/131070866/3778763.pdf
    • http://wokinixel.qwistjoseph.com/uploads/1/3/0/7/130775537/42b1bad89dec1.pdf
    • http://begur.thebestclass.org/uploads/1/3/1/4/131482995/1340351.pdf
    • http://files.threeaineconsultancy.com/uploads/1/3/1/0/131070125/587526f65.pdf
    • https://cdn.shopify.com/s/files/1/0428/8859/3567/files/my_immortal_evanescence_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0430/5905/2706/files/7171275207.pdf
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/16864665513.pdf
    • https://cdn.shopify.com/s/files/1/0447/8962/9085/files/managerial_accounting_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3048/5912/files/91140913582.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/plural_of_sheep.pdf
    • https://cdn.shopify.com/s/files/1/0429/2801/3471/files/40322861786.pdf
    • https://cdn.shopify.com/s/files/1/0438/0845/6865/files/the_bodybuilder_s_nutrition_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/zumovaxanebosuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63491738983.pdf
    • https://cdn.shopify.com/s/files/1/0430/1615/9385/files/virabuxatagofo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5212/1762/files/postal_exam_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/1289/7437/files/assured_shorthold_tenancy_agreement_england_and_wales.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_off00006af7.bin
08adb2210ab2aa24c1195b93d1e0af6f250f7071d5469ffd49c3dabfdef45916
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AF7 5296 bytes
font_01_sfnt_off00007d05.bin
a05d0ff021a9bcae982731b27d2d42198fe31dc2145b4e9e0ab9032b8d3e2406
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D05 9968 bytes