Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e05ae404b8aa6d…

MALICIOUS

PDF

41.6 KB Created: 2020-08-04 11:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccb04741c8babded9280d6b270748bdf SHA-1: c84883c45d417a795c321c971c8981ddc76b8ff5 SHA-256: 49e05ae404b8aa6d8799a72457fdd1fe0646170b2302ac3e1922c482d5361def
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=kalanchoe+gastonis+bonnieri+pdf'. The presence of a large number of external links, many hosted on Shopify, suggests an attempt to distribute content or lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=kalanchoe+gastonis+bonnieri+pdf
    • http://files.arizonastartales.com/uploads/1/3/0/7/130776561/lajoran_sexejupenevenif_rasuwot_jobanane.pdf
    • http://files.rivervalleypc.com/uploads/1/3/0/9/130968921/nenudimatobas.pdf
    • http://files.newhopewes.com/uploads/1/3/1/0/131070459/7935026.pdf
    • http://files.foundersworkshophr.com/uploads/1/3/2/3/132303337/b2ace35d52b1.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/44550061007.pdf
    • https://cdn.shopify.com/s/files/1/0428/8220/3811/files/96399121790.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/24691353642.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/509971435.pdf
    • https://cdn.shopify.com/s/files/1/0431/5211/3820/files/zijizekorobimazuliginun.pdf
    • https://cdn.shopify.com/s/files/1/0431/2272/0922/files/26339409171.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6396/files/keluvelixizalumamidija.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/kipigutiwalav.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/kujefitetelokikexakofowol.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/tivivirorodezijef.pdf
    • https://cdn.shopify.com/s/files/1/0436/3013/3406/files/55430775619.pdf
    • https://cdn.shopify.com/s/files/1/0437/7044/5975/files/gigizagim.pdf
    • https://cdn.shopify.com/s/files/1/0431/2609/6036/files/fovoja.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640d.bin
655a07379706a87c986946296158da09f2179360f8a79ddd8d55241027500a08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x640D 5524 bytes
font_01_sfnt_off000076ce.bin
654de8e26d16d9471116c5c3cfc4c06d5244eb64f2c68f28e419910666dec4d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CE 10180 bytes

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