Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7d335bb5ebcd91…

MALICIOUS

PDF

48.6 KB Created: 2020-08-24 00:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f80f62087d4d0e3bb0b5c13c99f81f4 SHA-1: d1182567e8240ce47a158dccea6b04260ce33cb0 SHA-256: 1d7d335bb5ebcd9140c5f7222af4c7d76d2853d09de4bb177975a8634e1a684f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'free employee attendance sheet template excel' and the primary malicious URL. This suggests a social engineering lure to redirect users to potentially malicious content. No scripts were extracted from this sample.

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=free+employee+attendance+sheet+template+excel
    • http://getexen.tracyedmunds.com/uploads/1/3/1/0/131070197/8909577.pdf
    • http://files.scoilnanonagle.com/uploads/1/3/1/3/131379236/genuvere_terowutolosefuz_bojaxugojob_jisujad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9937/4236/files/40814356507.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/22642655419.pdf
    • https://cdn.shopify.com/s/files/1/0430/5063/1319/files/dilikisetis.pdf
    • https://cdn.shopify.com/s/files/1/0438/8097/2456/files/88518688446.pdf
    • https://cdn.shopify.com/s/files/1/0430/4306/1913/files/24260624300.pdf
    • https://cdn.shopify.com/s/files/1/0438/5849/3600/files/tribe_archipelago_summit_presets_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/curso_aprendizajes_clave_para_directivos.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/midixujofisizafolavo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/payment_request_letter_sample.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_off0000807b.bin
3ebc39b22b0296a12cc18880903d3cc4499ea9bd346562b1104e7dcbad15bc1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 5436 bytes
font_01_sfnt_off000092ce.bin
7f18c92b21a6825faf7c0b4bce1225d76b7e87fbc73a6dbec7630e5b36cdd97c
pdf-font-stream PDF embedded font (sfnt) at offset 0x92CE 10244 bytes