Malicious PDF — malware analysis report

Static analysis result for SHA-256 1516aca2ddee605a…

MALICIOUS

PDF

64.2 KB Created: 2020-08-14 14:39:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200690ca7c3595427ebe6e99f693eeef SHA-1: 993fa30adb9b1a3b8610fbbaa27eed2d44446a9a SHA-256: 1516aca2ddee605ac4f77de5634e6230ee15bfecfc4c2a406b1a3df6de8877b2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one to a known malicious redirector, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=facundo+civilization+and+barbarism+pdf', which is flagged as malicious. The presence of embedded URLs and the ML classifier's high confidence indicate malicious intent, likely to redirect users to malicious content.

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.com/pify?keyword=facundo+civilization+and+barbarism+pdf
    • http://files.gradeeight.nestmusic.org/uploads/1/3/2/3/132302896/komijatajere.pdf
    • http://files.tac-tx.com/uploads/1/3/1/4/131453299/9329d105b629.pdf
    • http://files.ivmana.org/uploads/1/3/1/3/131381901/toxure.pdf
    • http://files.instituteofmonochromeart.com/uploads/1/3/2/6/132695732/185da5ae77.pdf
    • http://files.thecountryclubonline.com/uploads/1/3/0/7/130738534/saxaxo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3305/0779/files/28445546630.pdf
    • https://cdn.shopify.com/s/files/1/0436/6978/2693/files/27607946863.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66691602327.pdf
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/79878270942.pdf
    • https://cdn.shopify.com/s/files/1/0429/7526/4919/files/38859369090.pdf
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/numadazu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/bojikuloretalovitawezizu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/hexadecimal_addition_table.pdf
    • https://cdn.shopify.com/s/files/1/0432/1882/9472/files/ajax_jquery._min._js.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/61647857353.pdf
    • https://cdn.shopify.com/s/files/1/0432/7296/2203/files/72917283137.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_off0000bdca.bin
54cf3019b760f0f97e5108b0ddb22cb3146cdf42a301ff19d4ea7b53e2f1cba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCA 5508 bytes
font_01_sfnt_off0000d075.bin
a740b152dc3dc7952d31ebd51b6b1bc20b4f7f0d38cb90168ffc9868e536511e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD075 10452 bytes

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