Malicious PDF — malware analysis report

Static analysis result for SHA-256 062515c0c1dab635…

MALICIOUS

PDF

68.8 KB Created: 2020-08-14 19:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52e61d368ee7bdf3def418b8a6a6f35b SHA-1: 72f7bfc87521cc38a0924f8240180a442ba33b3c SHA-256: 062515c0c1dab635303298db45d493b710729473d1747c804b44afc9f3fc4319
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the same URL, suggesting an attempt to trick users into visiting a malicious site. The ML classifier strongly indicates malicious intent, and the presence of numerous external links points to a link farm or SEO abuse tactic.

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=compuestos+inorganicos+agua+y+sales+minerales+pdf
    • http://files.crustycap.com/uploads/1/3/2/3/132303226/pisiruloruw.pdf
    • http://files.misfitcrusaders.com/uploads/1/3/0/8/130814672/634f8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ledoviz.pdf
    • https://cdn.shopify.com/s/files/1/0440/0742/4158/files/79738365185.pdf
    • https://cdn.shopify.com/s/files/1/0431/2226/2178/files/kaguwokajapuzazafufapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8509/3281/files/pejuvajirokagaxup.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/9294904854.pdf
    • https://cdn.shopify.com/s/files/1/0439/7809/6798/files/deeprock_salt_wow.pdf
    • https://cdn.shopify.com/s/files/1/0430/8113/8343/files/62033906282.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0747/files/16572530308.pdf
    • https://cdn.shopify.com/s/files/1/0446/2352/8099/files/barakallah_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/majoniga.pdf
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/baidyanath_ayurvedic_medicine_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/nodawoxedatusuzoxap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5938/8320/files/87876626274.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_off0000cac6.bin
50c65dae739f0cb3de9035128ce01ed37e15c705327a400f6f51c7071e366883
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC6 5484 bytes
font_01_sfnt_off0000dd53.bin
73d29c65769c52ea3da210498fc8e0c5b4985043d7d5656f5803e3c3991073a5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 13400 bytes