Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ef73df36366a64…

MALICIOUS

PDF

53.8 KB Created: 2020-08-20 08:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e45614eca053ca30087b9647e64a74d SHA-1: ddd4afd9bce6b006a2083075446b6848e5b19ed2 SHA-256: 53ef73df36366a644c77683c5b72d34342d9eee7fa1aec53115eba935d2b33cb
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a medical treatment. The document body, though heavily corrupted, contains the same URL and a reference to 'wkhtmltopdf', suggesting it was generated programmatically. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for the malicious URL.

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=papilles+caliciformes+gonfl%25C3%25A9es+traitement
    • http://woluru.robertawolfson.com/uploads/1/3/1/3/131380213/dezutomo.pdf
    • http://files.szuyunwang.com/uploads/1/3/1/3/131380558/8f8f97.pdf
    • http://files.chrisheidt.net/uploads/1/3/1/4/131437322/roretomisibe-defejen-raxamugewif-rexubatuven.pdf
    • http://files.c-lution.com/uploads/1/3/2/7/132740978/soruvikitu.pdf
    • http://fuxupidal.highimpactanalysis.com/uploads/1/3/2/6/132683014/3bbf985c3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7192/files/8058901959.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/28465614312.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/votizepamesikegumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/32958107292.pdf
    • https://cdn.shopify.com/s/files/1/0431/9857/8848/files/vavamevujojojebukotelojer.pdf
    • https://cdn.shopify.com/s/files/1/0441/2401/2696/files/business_plan_sample_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4908/2264/files/viwefebitenerapapa.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/14398064472.pdf
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/subosobipipa.pdf
    • https://cdn.shopify.com/s/files/1/0433/3695/8104/files/30436582199.pdf
    • https://cdn.shopify.com/s/files/1/0430/7720/6165/files/35562969667.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/20997785736.pdf
    • https://cdn.shopify.com/s/files/1/0436/1447/0302/files/25374737855.pdf
    • https://cdn.shopify.com/s/files/1/0433/5268/6742/files/sejabisotorevewipika.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5680/files/letasofajonosowu.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_off000090b2.bin
42690497aa906befb647d7bf532f03a4ac9c375e12df93b78d0964c20975f339
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B2 5480 bytes
font_01_sfnt_off0000a2f6.bin
ef4ed476067a5a0abed91a0477fb8b256a805bc4d5093a60ee05284c1bb93339
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2F6 11668 bytes