Malicious PDF — malware analysis report

Static analysis result for SHA-256 09deb96bf0199a8e…

MALICIOUS

PDF

56.8 KB Created: 2020-08-09 22:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c74b75bdc29e686318af0b2ec517040 SHA-1: 9a728b9d3e6dc6f92b8533bcfe1f731653116b2c SHA-256: 09deb96bf0199a8e75f4182e35596b69569b516bdaa1f24cfda9b5dfa01185c8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, also contains URLs pointing to external resources. This suggests the primary function is to redirect users to malicious sites, potentially for further exploitation or phishing. No scripts were extracted, and the document body's content is not directly indicative of a specific lure beyond the links themselves.

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=progetto+braccio+meccanico+pdf
    • http://lorej.nicolemartinetti.com/uploads/1/3/1/4/131409090/wofadakopu.pdf
    • http://xoxuka.jennicollinsmarketing.com/uploads/1/3/1/6/131637136/nupixiw.pdf
    • http://files.bluewrenmosaics.com/uploads/1/3/1/6/131636825/40a8bc3ed94758.pdf
    • http://buvukuf.renmach.com/uploads/1/3/1/6/131606289/9df3178b0a3.pdf
    • http://files.womanbloom.org/uploads/1/3/0/8/130873930/gizimajo-nilogifugu-dokuti-noleluxikag.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/20204276570.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4177/files/nozofakefesedisag.pdf
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/5286862134.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/mefujavu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2708/4965/files/gotulofiwazufibul.pdf
    • https://cdn.shopify.com/s/files/1/0434/7500/9696/files/crystal_oscillator_circuit_design.pdf
    • https://cdn.shopify.com/s/files/1/0433/9079/5934/files/verbe_etre_en_anglais_forme_affirmative_negative_et_interrogative.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/kiln_cement_plant.pdf
    • https://cdn.shopify.com/s/files/1/0438/4181/4693/files/20231418925.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/19064182519.pdf
    • https://cdn.shopify.com/s/files/1/0432/2466/2173/files/81160119819.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_off00009c20.bin
7efb6872a31ea2d84243f1d852fd9dabf22bffe94a2ece9c82005e213e1e926a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C20 5404 bytes
font_01_sfnt_off0000ae6d.bin
6c137d066addec387eedcb3553021062fd53248cc0b686ae22d14f2b9b9a3c30		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE6D 11784 bytes

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