Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6cd7d39bb8d79ba…

MALICIOUS

PDF

53.2 KB Created: 2020-08-05 14:07:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deed7d381bedb72f590faf73644f1a63 SHA-1: 70cf3398a61522239893cb71743036c0a482cb27 SHA-256: a6cd7d39bb8d79ba701a04d988e975bfcc2e7a669fd9b1d4360cfb8b6b2f10cd
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to Shopify domains, forming a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=international+franchising+pdf', is identified as a malicious redirector. This suggests the document's purpose is to lure users into clicking these links, ultimately leading them to malicious content or phishing sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious redirection 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.cc/pify?keyword=international+franchising+pdf
    • http://files.lpdcllc.com/uploads/1/3/1/1/131164546/vudog-jimazom.pdf
    • http://files.connectedpropertyinvestment.co.uk/uploads/1/3/0/8/130814597/394264984.pdf
    • http://files.dakotacustombuildersllc.com/uploads/1/3/0/7/130775150/454a27ed4.pdf
    • http://files.themusicofheart.com/uploads/1/3/1/6/131606984/nobiwozi_vetikaxowaxi_wuxuduxan.pdf
    • http://files.merakiwool.com/uploads/1/3/2/6/132680822/kusela_tejirune_novikepirolig_rufulusan.pdf
    • https://cdn.shopify.com/s/files/1/0434/4473/2065/files/12322426666.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/ruzikopozonola.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/nedofiwekejikiwopesagitiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/2355/7030/files/vinugijanazimidaredej.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/resufexogosodarowaxenobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/92652031428.pdf
    • https://cdn.shopify.com/s/files/1/0428/8066/3705/files/52737611679.pdf
    • https://cdn.shopify.com/s/files/1/0429/0406/0071/files/22169448795.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/zetulisirazituman.pdf
    • https://cdn.shopify.com/s/files/1/0441/2473/3592/files/23857643606.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50878135704.pdf
    • https://cdn.shopify.com/s/files/1/0432/7286/3904/files/75571731510.pdf
    • https://cdn.shopify.com/s/files/1/0432/8862/5302/files/34835795734.pdf
    • https://cdn.shopify.com/s/files/1/0434/3663/8360/files/76231914089.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000077fe.bin
e3f55b28f583cbae381f20b9871a5e84cedaadf0000a9bb04f4c5eec55a0387e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77FE 5356 bytes
font_01_sfnt_off00008a2c.bin
53aaf2548f60cedc441971e01184a210a1c75a964f8309fdca4020b687ea579c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2C 10192 bytes
font_02_sfnt_off0000ad22.bin
1812b663afec50cf0aa80160b285ffd3b460049c3d3d8ee3043277c5bebcf5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD22 17568 bytes

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