Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d30cd09958a2e1a…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 18:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787b58613af3db4ab096f3f99ba6f2b2 SHA-1: d60f2d0f4133bc3bcd0bfa67b48d24387567fa25 SHA-256: 5d30cd09958a2e1a19c750a0a8f336e724205f0e79145a3fba083ae693e3af27
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, likely as part of a link farm or SEO manipulation tactic to drive traffic. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to trick users into clicking it. The ML classifier strongly indicated maliciousness, supporting the presence of malicious content.

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=digital+multimeter+dt830d+manual+pdf
    • http://mekodazum.virtualhrpros.com/uploads/1/3/0/7/130738720/mipojorowonasoles.pdf
    • http://xenak.electropathi.com/uploads/1/3/2/7/132712323/rutefutizutixeperi.pdf
    • http://patoxubiw.penelopewylde.com/uploads/1/3/1/4/131406390/dagidaren.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3035/5866/files/17305146540.pdf
    • https://cdn.shopify.com/s/files/1/0431/0617/3077/files/diferencia_entre_amortizacion_y_depreciacion.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zijuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/rorugo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/42431409094.pdf
    • https://cdn.shopify.com/s/files/1/0434/3264/0664/files/nanenoradufun.pdf
    • https://cdn.shopify.com/s/files/1/0434/7019/2802/files/mibutuserudadodudiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7870/4536/files/bill_mollison_permaculture.pdf
    • https://cdn.shopify.com/s/files/1/0435/7816/3363/files/ramizatuvokobexiviza.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_off00005b51.bin
37e82a7742571499299697556a7ee2925da6f65093af63ee198a8f2a77b35bf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B51 5680 bytes
font_01_sfnt_off00006e9a.bin
659945f314a47aefc50c324cd7063c61e1e13722298d6a4ab750d5bcb00523a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9A 15820 bytes