Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab665fea0b9999d…

MALICIOUS

PDF

36.5 KB Created: 2020-08-23 09:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c130b700cf363bce372fd168f1a3d07f SHA-1: 23aa924cdfc99529d254c3b09de1c0b5b22450c8 SHA-256: 1ab665fea0b9999da12ded81743517684f9bbaaad4277dadd90193efb4947223
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a high number of embedded links. One of these links, 'https://ttraff.com/pify?keyword=bus+game++uptodown', points to known malicious redirector infrastructure. The document appears to be part of an SEO link farm, with many links pointing to Shopify-hosted PDFs, likely to manipulate search engine rankings or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=bus+game++uptodown
    • http://files.sarahavalia.com/uploads/1/3/0/7/130776183/xesebexeladonej_gowidebugogumes_benazal.pdf
    • http://saxes.uruguayanchamberusa.com/uploads/1/3/1/4/131454106/vuxojagesefuxem.pdf
    • https://cdn.shopify.com/s/files/1/0428/8803/6515/files/ar_abbreviation_state.pdf
    • https://cdn.shopify.com/s/files/1/0437/6104/1559/files/nabisale.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/vejetatabaluwedogariwef.pdf
    • https://cdn.shopify.com/s/files/1/0431/1518/4277/files/94318769136.pdf
    • https://cdn.shopify.com/s/files/1/0433/4298/7422/files/dijunuxikerofo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4729/5898/files/vopelivakogole.pdf
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/reridigasajosiwedebe.pdf
    • https://cdn.shopify.com/s/files/1/0438/1641/9488/files/stepper_motor_drive.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/13232356185.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_off0000525d.bin
ae1a91f822d182af45707ca9a83472976f54ce8e6b33eb7202e76024d4503ed5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x525D 5292 bytes
font_01_sfnt_off00006463.bin
a09d1d74fd4476c856b8c8936fec620a58de3137b5041a4f1881bdc0b60594da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6463 9764 bytes

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