Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fca2f745d11c796…

MALICIOUS

PDF

42.8 KB Created: 2020-08-20 09:00:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d06e794026f1bbfae65089083a81dfd SHA-1: 3b98d3c020d4558fabb01329991067279c0a48a7 SHA-256: 5fca2f745d11c79639fc6faa11b63e751375d59a332b3ff60f616ac21016b7b9
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and a primary link to a known malicious redirector. This indicates a likely SEO poisoning or traffic generation scheme. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious content or structure. 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.ru/pify?keyword=beyond+the+valley+of+thorns+pdf
    • http://files.lavishvas.com/uploads/1/3/1/4/131453097/4118511.pdf
    • http://files.pamschultzgallery.com/uploads/1/3/0/8/130873899/tetojifive.pdf
    • http://napodiza.icellw.com/uploads/1/3/1/8/131857565/vimux_peridaxurifalem_jiwave_bisukupaj.pdf
    • http://files.royalinspectionskc.com/uploads/1/3/0/8/130813132/8574475.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/lixivufuzibagajifudulanu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/playboy_special_editions.pdf
    • https://cdn.shopify.com/s/files/1/0430/3978/5111/files/xatumujuxunexe.pdf
    • https://cdn.shopify.com/s/files/1/0440/7469/6856/files/sesalewimulasurasizaluvu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3319/7718/files/21203071560.pdf
    • https://cdn.shopify.com/s/files/1/0438/2425/1042/files/92698600592.pdf
    • https://cdn.shopify.com/s/files/1/0438/2264/5408/files/bukhari_sharif_bangla_all_parts.pdf
    • https://cdn.shopify.com/s/files/1/0438/5007/2224/files/5000587016.pdf
    • https://cdn.shopify.com/s/files/1/0439/0967/7224/files/xuxizibubeza.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/mewexatagunogezotonijuke.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_off000069f2.bin
29d4d6059df52aa4ae871e74705324a2f9dc887a1434401b87add0023a19681a
pdf-font-stream PDF embedded font (sfnt) at offset 0x69F2 5340 bytes
font_01_sfnt_off00007c27.bin
aa708da710b51be245e99b64e72b636c1f0ba9baac39a3284863e69181ae8ae6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C27 10144 bytes