Malicious PDF — malware analysis report

Static analysis result for SHA-256 50fb2c19e1b7ba8b…

MALICIOUS

PDF

44.3 KB Created: 2020-08-08 18:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b5a27886d8dce44ca3f1b561f412989 SHA-1: 8415e758d8f5b98e08e202db6660a931e91b26b3 SHA-256: 50fb2c19e1b7ba8b4bfddb3ecc45067e5260448d20085b533ed0dfa0daf05e49
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a land agreement form, aiming to lure users to a malicious site. The PDF also hosts a large number of external links, many pointing to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier 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.com/pify?keyword=land+agreement+form+kenya+pdf
    • http://lazedegu.renatasellitti.com/uploads/1/3/0/8/130874304/dolosa.pdf
    • http://files.portagewarriorfb.com/uploads/1/3/1/3/131380467/465b2d56b15c5d.pdf
    • http://files.d2bjewelry.com/uploads/1/3/2/8/132814305/dimer.pdf
    • http://files.sterconwalds.org.uk/uploads/1/3/1/4/131453291/1332249.pdf
    • http://files.talentstor.com/uploads/1/3/1/4/131453288/dawaredapuxixar_donefebeneka_fudepebiforuw_kekuv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3893/files/easl_cirrhosis_guidelines_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3731/0626/files/satsuma_street.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wogol.pdf
    • https://cdn.shopify.com/s/files/1/0437/1313/4757/files/34228417717.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0836/files/reputewonodofutupitidamox.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/67401846945.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/24328349873.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/30964322983.pdf
    • https://cdn.shopify.com/s/files/1/0434/3945/6423/files/moxedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0780/2518/files/new_headway_beginner_student_s_book_fourth_edition_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3366/4420/files/mifojeripurisutiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/5486/5320/files/98186788058.pdf
    • https://cdn.shopify.com/s/files/1/0431/4716/5850/files/wufexadugozemagezuzinolan.pdf
    • https://cdn.shopify.com/s/files/1/0440/1584/5541/files/43411851217.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/prove_it_data_entry_test.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/
    • https://cdn.shopify.com/s/fil

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b2.bin
fd64cf6957b50774babba6a79020b8e98e2a9efeee8c6382213bbd411a8dbcbb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 5000 bytes
font_01_sfnt_off000073a5.bin
49c974237fd61b219e3d3eff4d889b149f05d6562e425532ed8e8fad1d9ee3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A5 9996 bytes
font_02_sfnt_off000095d3.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95D3 4324 bytes

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