Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad311541b8bc3adf…

MALICIOUS

PDF

42.4 KB Created: 2020-08-19 02:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 42c953cf8815517f8c0f7e1aa79db9db SHA-1: 0b5be68ca804f71325d0da49d0a62251c58fc359 SHA-256: ad311541b8bc3adf1c61f886a67dcafff031f50a7ab053c3857cf609c52b4185
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=curriculum+vitae+template+word+indonesia', is designed to lure users by appearing to offer a CV template. The file also contains a PDF link farm, with many links pointing to Shopify domains, but one suspicious link to 'http://rujukil.ggshoneybeez.com/uploads/1/3/1/0/131070872/dixem.pdf'. No scripts were extracted, but the presence of malicious redirector links and the deceptive document content strongly suggest a phishing or social engineering attack.

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.ru/pify?keyword=curriculum+vitae+template+word+indonesia
    • http://rujukil.ggshoneybeez.com/uploads/1/3/1/0/131070872/dixem.pdf
    • https://cdn.shopify.com/s/files/1/0428/8059/8172/files/57687305828.pdf
    • https://cdn.shopify.com/s/files/1/0433/8001/5262/files/38835907736.pdf
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/48393532356.pdf
    • https://cdn.shopify.com/s/files/1/0432/9983/1966/files/zexuvomulol.pdf
    • https://cdn.shopify.com/s/files/1/0432/6221/4304/files/liriroferedegu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8529/1937/files/gomirabepag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1555/2674/files/tebagom.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/80844906290.pdf
    • https://cdn.shopify.com/s/files/1/0437/1634/6007/files/mofuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9576/files/treatment_of_acute_ischemic_stroke.pdf
    • https://cdn.shopify.com/s/files/1/0432/4084/9575/files/kojumiravasajino.pdf
    • https://cdn.shopify.com/s/files/1/0445/4963/6255/files/cambridge_english_in_mind_workbook_3_answers.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_off0000680d.bin
87f6fac95b50dfeea81f3ec9f3743bc9c81a1f89b8eefe21a61d9de75098980a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x680D 5276 bytes
font_01_sfnt_off000079ef.bin
533af58f1574222fadec00df6fa9e1646367651fff0a2058755332b8f30d47de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79EF 10156 bytes

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