Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d4ced987e9bd069…

MALICIOUS

PDF

70.3 KB Created: 2020-08-10 08:10:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a98acfd2c3f656c12471721ea7e90eca SHA-1: 71b8db98ab5fe322f462d64a8ecf981678f5e2f3 SHA-256: 1d4ced987e9bd069b81a7a2a60ac6f3efede64349fa2d7ac65e1ccd2a7f64bfc
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a document about oxy-acetylene gas welding. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=oxy+acetylene+gas+welding+pdf
    • http://files.mindfulnessbasedart.com/uploads/1/3/0/8/130814475/3009285.pdf
    • http://files.wncvacationguide.com/uploads/1/3/1/4/131483249/konezapase_dosoxekomogume_jojogapow_gubixu.pdf
    • http://files.synthesisaestheticsproject.org/uploads/1/3/2/6/132681307/4db4c.pdf
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • http://files.baarleproeft.com/uploads/1/3/0/9/130969847/lafafagukisiliwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/fifosubemizidemajevef.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3784/files/www_eyny_com.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/61435382648.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3813/files/73700112071.pdf
    • https://cdn.shopify.com/s/files/1/0430/7304/4642/files/nopimekalenusimegozo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0120/0289/files/97539085530.pdf
    • https://cdn.shopify.com/s/files/1/0440/1460/0342/files/mortal_instruments_graphic_novel_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/hips_dont_lie_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/15129244705.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/bapotujatapalazizil.pdf
    • https://cdn.shopify.com/s/files/1/0432/0372/3428/files/movezonawobiluba.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_off0000d64f.bin
d7faa8adbc4bb3a7336db2ac9d00278df6e749b1cf604463c98478aebd289441		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD64F 5516 bytes
font_01_sfnt_off0000e94f.bin
8adb8e6c6e36a35753aab0638e39193c245ba62db450eb383286421f2a4d85a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 10208 bytes

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