Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa3d33a5e0a560c…

MALICIOUS

PDF

55.3 KB Created: 2020-08-10 17:16:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ec16d4d14090e039bef5a903c9f5bbe SHA-1: ccf2544598f1afa7b98e014b95bbf1e76c5a959b SHA-256: eaa3d33a5e0a560c0494913eee7dd7d05e31e2b7c51fb833e00ac8a79def67f1
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and text suggesting it is a PDF about guitar chords, likely a lure. The ML_NYX_PDF_MALICIOUS heuristic also strongly indicates maliciousness. The primary attack vector appears to be directing the user to a malicious site via the embedded link.

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=les+accords+de+base+guitare+pdf
    • http://files.kurtweissgerber.com/uploads/1/3/1/0/131069819/gibapalarifirose.pdf
    • http://files.amberschamel.com/uploads/1/3/2/6/132683142/mukeleko_zetofagifirim_xemigutixum.pdf
    • http://files.trebellepianotrio.org/uploads/1/3/2/8/132814050/5697667.pdf
    • http://vekozom.reneeaudubon.com/uploads/1/3/2/3/132303382/3721754.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/24434745227.pdf
    • https://cdn.shopify.com/s/files/1/0432/2308/9307/files/nisisaxitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1096/5147/files/91538381102.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/metegemekipezafekude.pdf
    • https://cdn.shopify.com/s/files/1/0437/8322/5506/files/99504332947.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/34209436245.pdf
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/vuvoguguvumapevel.pdf
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/sugajusunofoxukodobom.pdf
    • https://cdn.shopify.com/s/files/1/0434/1363/5226/files/pivikisijuxelixis.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/30903181622.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/94618146349.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6073/files/15641663549.pdf
    • https://cdn.shopify.com/s/files/1/0430/8995/2922/files/66499709715.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_off00008be5.bin
55cfbc8c97a5cac02100ea566b8d59a43a1204f307d0404003dfeba64232b874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE5 5148 bytes
font_01_sfnt_off00009d7a.bin
d1dc1c1f459d3428535bc46772f19e005167f506a390a16d68158bf8d7c665e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D7A 11608 bytes
font_02_sfnt_off0000c1f6.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F6 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.