Malicious PDF — malware analysis report

Static analysis result for SHA-256 093e7ffbe70a0c34…

MALICIOUS

PDF

44.3 KB Created: 2020-08-04 07:47:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad419fbcec95dcccb903a76eadec5421 SHA-1: ad32f3b3bafcc332ecc09256cd929bea86a48aa4 SHA-256: 093e7ffbe70a0c34be89a25307d8309ad76f028cdd9e4ee17aadbdb096a2e686
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, disguised as a download for 'change management pdf notes'. The ML classifier strongly indicated maliciousness, and the PDF was found to contain a large number of external links, suggesting a link farm or redirection scheme. The primary IOC is the malicious redirector URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=change+management+pdf+notes+download
    • http://files.luxesneakerboutique.com/uploads/1/3/0/7/130775853/gizuluveroji-rofinowaxuk-jejis-mokuzigavabi.pdf
    • http://files.gclothingofficial.com/uploads/1/3/0/7/130739747/fazenewumolako.pdf
    • http://files.dlcutters.com/uploads/1/3/1/1/131164473/6b795.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/18007550564.pdf
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/zufojunajajadal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/posolosavejuluge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/73941010366.pdf
    • https://cdn.shopify.com/s/files/1/0439/0469/6472/files/75046101936.pdf
    • https://cdn.shopify.com/s/files/1/0431/4886/9789/files/62706578439.pdf
    • https://cdn.shopify.com/s/files/1/0439/2475/0491/files/41084838126.pdf
    • https://cdn.shopify.com/s/files/1/0431/0951/5425/files/zakalozivakoje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sazofafusogowo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/40811302600.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/bharat_mata_ki_aarti.pdf
    • https://cdn.shopify.com/s/files/1/0433/5733/9813/files/2921201360.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://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050db.bin
048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50DB 6744 bytes
font_01_sfnt_off000061c0.bin
6df2e133d90a22b485852124d27d58ab8743bd87017316504efb11b8bbf31981		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 5212 bytes
font_02_sfnt_off0000736d.bin
659a0abe77f199a36fc748d97fdb815c93958cf6a1c26916e52bd7bd9d5c7607		 pdf-font-stream PDF embedded font (sfnt) at offset 0x736D 10044 bytes
font_03_sfnt_off000095bf.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95BF 4324 bytes

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