Malicious PDF — malware analysis report

Static analysis result for SHA-256 111d41e933250450…

MALICIOUS

PDF

49.7 KB Created: 2020-08-07 23:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9daa893fd429b75794c6a5a06fb7a47 SHA-1: 10d69195dafc08de41a1f014b852844e14774747 SHA-256: 111d41e93325045097eed6ebf44046a122221841d0220efd7b294a18dc21ef53
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, which is designed to lead users to further malicious content. The document also hosts a large number of external PDF links, likely for SEO manipulation or to obscure the primary malicious link. The ML classifier strongly indicated maliciousness, supporting the presence of malicious infrastructure.

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.com/pify?keyword=carbono+quiral+exercicios+pdf
    • http://files.safe-t-systems.net/uploads/1/3/0/7/130739490/4bc6d613f9d45.pdf
    • http://files.coloradoinclusivefunders.org/uploads/1/3/1/6/131606027/wumelif.pdf
    • http://files.firsthomepurchases.biz/uploads/1/3/0/9/130969075/ada83a4ed91c.pdf
    • http://kobajeme.meowhousecatrescue.com/uploads/1/3/2/6/132695569/vofexame.pdf
    • http://files.wls-phd.com/uploads/1/3/1/4/131437147/laxabobifotuve_pigebikegetib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/jumutanijosula.pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/gekulerozunekunojotediw.pdf
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/81756727696.pdf
    • https://cdn.shopify.com/s/files/1/0428/0123/4076/files/60901432285.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/81398569650.pdf
    • https://cdn.shopify.com/s/files/1/0433/3849/8206/files/27512183304.pdf
    • https://cdn.shopify.com/s/files/1/0433/2155/7147/files/jifeda.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/69190553442.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31906594002.pdf
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/6871167152.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/schedule_1299-_c.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/48114681645.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/29716570954.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e9f.bin
329bfa42ff27a47a771f638ff8a69eba6381cc20807cef73a4192e1eac789704		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5388 bytes
font_01_sfnt_off000080f7.bin
9589b8c8b3bde1ff951c1855acfe0425b23546736d872ee3703f20a00b95bedd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80F7 10352 bytes
font_02_sfnt_off0000a491.bin
5d067f3ed25c947100d6e11befc4ff8f2526c29946dd398e4c33d9c92d35bad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA491 16092 bytes

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