Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6df8b2fcbf29222…

MALICIOUS

PDF

45.1 KB Created: 2020-08-17 17:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32ed93452b59119abf82fd72d0fcc48b SHA-1: 4e8397596250a5183faa4091c374a7a542b076f4 SHA-256: e6df8b2fcbf29222ea8c3165c1231b456c51445ea542fe551707f26fec6ebda4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary redirector identified as ttraff.com. This suggests a link farm or redirection strategy to obscure the final malicious destination. The ML classifier strongly indicated maliciousness, and the presence of numerous links points towards a phishing or malware distribution attempt.

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=emtee+way+up
    • http://files.maigretfamilyfarm.com/uploads/1/3/1/8/131857782/ba590.pdf
    • http://files.nhscienceforcitizens.org/uploads/1/3/1/6/131637570/e3aecf41ee583f.pdf
    • http://sovavunus.drjmorrone.com/uploads/1/3/0/9/130969723/6786973.pdf
    • http://files.islandtrails.org/uploads/1/3/0/8/130874012/mebevu-wugixup-banosarevewu-mijig.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/79476528201.pdf
    • https://cdn.shopify.com/s/files/1/0435/8324/2401/files/21661368035.pdf
    • https://cdn.shopify.com/s/files/1/0441/2289/8584/files/fanoposomerewipibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0776/1819/files/viwupinewikagifuxupinel.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/modarosop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0429/4557/7116/files/vusajafowuduf.pdf
    • https://cdn.shopify.com/s/files/1/0433/5471/8358/files/midabukubotikunekegavo.pdf
    • https://cdn.shopify.com/s/files/1/0436/1791/0941/files/tedov.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/gekizaxeripawedon.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9812/files/bixalirirodutuk.pdf
    • https://cdn.shopify.com/s/files/1/0434/2752/8861/files/bonafide_certificate_download_rajasthan.pdf
    • https://cdn.shopify.com/s/files/1/0430/8077/7882/files/gadubulegosegosojudi.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_off000074f1.bin
a2799e598edd842dcbb47386c26af5e512da271ea0eb8547708d2b320f8659da
pdf-font-stream PDF embedded font (sfnt) at offset 0x74F1 4808 bytes
font_01_sfnt_off00008554.bin
2250d41e54b5e5c99714b48871e2c481bf6def3e68787f70370f29aa54618db0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8554 10228 bytes