Malicious PDF — malware analysis report

Static analysis result for SHA-256 f121686015241124…

MALICIOUS

PDF

58.2 KB Created: 2020-07-10 03:02:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18283e78c90bf207e38be9e88fe51509 SHA-1: 0527aceaa288e9ffbec6c5e06f169708b6775057 SHA-256: f121686015241124fa344ac296755210014d7f623ace9a2b40325d85b6285912
152 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure, and another indicated a large external PDF link farm. The document body, though heavily obfuscated, contains references to these URLs, suggesting a malicious intent to redirect users or manipulate search engine results.

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/wb?keyword=pengertian%20radikalisme%20menurut%20para%20ahli%20pdf
    • http://files.woodyshticks.com/uploads/1/3/1/3/131379612/ritozo_luwubuvilul_bizifodoli.pdf
    • http://files.publichealthmuseum.org/uploads/1/3/1/3/131384789/a826b1b39.pdf
    • http://files.skunkvalley.com/uploads/1/3/1/6/131606353/2dee573155f.pdf
    • http://files.rynnailes.com/uploads/1/3/1/3/131379168/611424.pdf
    • http://files.ingathompsonfoundation.com/uploads/1/3/1/4/131438423/e634d.pdf
    • http://files.waveloopart.com/uploads/1/3/2/7/132740343/883d0.pdf
    • http://files.laviishluxxe.com/uploads/1/3/0/7/130775942/1a41a3f.pdf
    • https://bomutap.files.wordpress.com/2020/06/kajelonimubax.pdf
    • https://getakoridun.files.wordpress.com/2020/06/97872665626.pdf
    • https://fabitilo.files.wordpress.com/2020/06/lupuvedogevubup.pdf
    • https://fojekiv.files.wordpress.com/2020/06/33697344370.pdf
    • https://nemujatisale.files.wordpress.com/2020/06/misapewenuvarexafuwur.pdf
    • https://lipurenipagu.files.wordpress.com/2020/06/jadifesozobofopukenuledop.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75555741983.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32829552166.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/peregomosurexezobosezob.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53607129813.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/radeziwiwilajumigetadad.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_off0000a6f3.bin
49bd969ca986dfd96e84d14b4ae25f2714b58b9a068f69774c957d060a43362e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F3 5292 bytes
font_01_sfnt_off0000b8bb.bin
54cae182c56fc987ac78fbb55975aeb6548d51e64f53f9abecdc946744a1436a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BB 10076 bytes

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