Malicious PDF — malware analysis report

Static analysis result for SHA-256 058e7d035d5e345c…

MALICIOUS

PDF

61.9 KB Created: 2020-08-12 22:13:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d63fc79477364b330a8d72aaa9318a SHA-1: 637f5fbfb0ff82ca09da111a2e94ee6aa94c72c6 SHA-256: 058e7d035d5e345cc51d1c95f7e989efa6b5535edfbaad2f8efe1f6dfdeffc4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector's target. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or to download further payloads.

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.ru/pify?keyword=modelo+neoliberal+en+chile+pdf
    • http://lesaj.shopdonanolicigar.com/uploads/1/3/1/3/131380739/37c3af1c9fa20f3.pdf
    • http://jazur.refugefriendsinc.org/uploads/1/3/1/8/131871674/ab816629.pdf
    • http://bebijej.michelebarnes.com/uploads/1/3/0/7/130740013/romebelep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/1887/1207/files/84279332213.pdf
    • https://cdn.shopify.com/s/files/1/0447/9886/9653/files/metodos_anticonceptivos_ginecologia.pdf
    • https://cdn.shopify.com/s/files/1/0435/9805/3535/files/romijejuxumelunagujika.pdf
    • https://cdn.shopify.com/s/files/1/0434/6380/3046/files/nowobenidelinetadegenupo.pdf
    • https://cdn.shopify.com/s/files/1/0436/4589/4816/files/lulukexubilur.pdf
    • https://cdn.shopify.com/s/files/1/0430/9506/4730/files/35418057231.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6111/files/88096602878.pdf
    • https://cdn.shopify.com/s/files/1/0433/6166/5192/files/what_your_life_like_lil_durk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/98550443618.pdf
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/12420330063.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/roman_belami.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/titigabibuzumazavuxi.pdf
    • https://cdn.shopify.com/s/files/1/0452/2963/7792/files/pulse_oximeter_working_principle.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b391.bin
25b7cdaa68b053fae208412ec476ae2c1d4af8d4d2c20d5c22e946bc522cc4b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB391 5208 bytes
font_01_sfnt_off0000c542.bin
ace852186467a7f2cc61e5f801dd48eae2215858c962fbd8cf91cbb5b306e867
pdf-font-stream PDF embedded font (sfnt) at offset 0xC542 11476 bytes