Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c48657ff579e18a…

MALICIOUS

PDF

36.9 KB Created: 2020-08-05 03:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2ad5e5ccc7e2395468d53161845680c SHA-1: 229f9836fdfe085f0683cef8099ea469d0e29aa3 SHA-256: 2c48657ff579e18a4df110dcf92b613552ad37f815190e7cf549076098f41fda
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a catalogue, likely a lure to encourage clicks on the malicious URL. The ML classifier also strongly indicated 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.com/pify?keyword=oxford+university+press+catalogue+pdf
    • http://files.coastalretreatsdevon.com/uploads/1/3/0/7/130738875/5d59d45bddd.pdf
    • http://files.bestestmoviemoments.com/uploads/1/3/1/8/131871816/funomunagalafuv.pdf
    • http://files.rethinkreframerelax.com/uploads/1/3/0/7/130739027/vomume.pdf
    • http://files.innovative-teacher-motivated-student-project.com/uploads/1/3/0/8/130815095/5486015.pdf
    • http://files.purelifealliance.org/uploads/1/3/2/8/132814935/9766190.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4099/files/pawufodivawojawozofiseka.pdf
    • https://cdn.shopify.com/s/files/1/0438/3549/0466/files/fonovojifazizuxekepi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/fapuzebigus.pdf
    • https://cdn.shopify.com/s/files/1/0436/7086/4025/files/berebilaxerajuronodifisat.pdf
    • https://cdn.shopify.com/s/files/1/0429/2067/3433/files/ed_95_9c_ea_b5_ad.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/xixapasitalirotedipopude.pdf
    • https://cdn.shopify.com/s/files/1/0427/9782/6207/files/78972064490.pdf
    • https://cdn.shopify.com/s/files/1/0433/5671/7207/files/9797697216.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3117/files/37756283752.pdf
    • https://cdn.shopify.com/s/files/1/0431/6200/9760/files/wifub.pdf
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/veduno.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/53284297508.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/fuzalikesomote.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_off00004f64.bin
74b368edc748832773bb98a6633aa5b69c3f9dec2a459156e3f5b6347dfcfd5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F64 5580 bytes
font_01_sfnt_off0000628b.bin
3640fb7990551b456bc2e2bf395a5b9ead156ba2cd585ab5f4921c0d486af9d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 10568 bytes

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