Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d07c7486700f58d…

MALICIOUS

PDF

51.7 KB Created: 2020-07-30 21:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e7809ca903df7633640209f44030400 SHA-1: 56204ebf40a2e8d832ab8c219704588231972acb SHA-256: 5d07c7486700f58d97908f16e090662ad4f2051808a311572259b7360b1ed07f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body text, though heavily obfuscated, suggests a lure related to financial forms, likely to trick users into clicking the malicious link. No scripts were extracted, but the presence of numerous external links points to a content-farm or phishing attempt.

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=axis+mutual+fund+sip+application+form+pdf
    • http://files.copycat1.com/uploads/1/3/2/6/132695575/d63b35.pdf
    • http://files.greendreamwaianae.com/uploads/1/3/0/8/130874222/kofidikufov_xatewatolu.pdf
    • http://files.gtchsdevelopment.org/uploads/1/3/0/8/130814078/juriruli.pdf
    • http://files.opt4adventure.com/uploads/1/3/1/6/131636654/bijobazupejiduxoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7140/6237/files/45216262888.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6879/8614/files/39173612866.pdf
    • https://cdn.shopify.com/s/files/1/0434/6612/9574/files/23721236768.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/sukubekuv.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/sizukokuxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9610/4348/files/sedaboxibegofanejuzaze.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/kuvujabejune.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/zololufofafoginipegifaba.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/senepojolabukowodarezu.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_off00008c6d.bin
13fb69480ad4342515b74121853f48e1282cfa85f3e7baa749b3db13e9f3d676
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C6D 5124 bytes
font_01_sfnt_off00009dac.bin
ea2f38062f7970fd10954b30c04dc4a7b06d18a8c028b291f95010cf7cec2cd4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9DAC 10480 bytes