Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5b28c406d2c2bae…

MALICIOUS

PDF

45.8 KB Created: 2020-08-12 00:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8fd750ae1642baa5dfb432695f8d7d3 SHA-1: ffee6377a6967dd7203b870a2624f88929887426 SHA-256: e5b28c406d2c2bae0ea5f333a4c7f9820b1073627aad922e952cb52c10108e80
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=ekstrak+bayam+merah+pdf'. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The ML classifier strongly flags this PDF as malicious. The document body appears to be malformed or obfuscated, but the presence of the malicious URL is the primary indicator of compromise.

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=ekstrak+bayam+merah+pdf
    • http://files.peacefulsoulcounseling.com/uploads/1/3/0/9/130969982/73e7b103b3.pdf
    • http://files.claireallegrataylor.com/uploads/1/3/1/8/131872087/kuvuj_xekal_bizupox.pdf
    • http://files.rheumatoidarthritishealingnaturally.com/uploads/1/3/1/3/131384279/fosesige.pdf
    • http://files.paradisevalleyequine.com/uploads/1/3/1/3/131383493/raxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0437/2961/7057/files/denapapokesiw.pdf
    • https://cdn.shopify.com/s/files/1/0437/5959/9765/files/jufakexolanulidav.pdf
    • https://cdn.shopify.com/s/files/1/0433/4940/9950/files/get_back_beatles_tab.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/48345096346.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/alcoholics_anonymous_big_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/zinetesowasiwurukevopat.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/71533378521.pdf
    • https://cdn.shopify.com/s/files/1/0429/4397/1484/files/ajax_datatype_application.pdf
    • https://cdn.shopify.com/s/files/1/0429/2725/9811/files/67373154327.pdf
    • https://cdn.shopify.com/s/files/1/0447/5315/8298/files/rti_application_form_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2443/files/kiwado.pdf
    • https://cdn.shopify.com/s/files/1/0431/5778/2690/files/siwadajijozenugavuk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9943/0815/files/who_s_afraid_of_virginia_woolf_book.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_off000075d6.bin
56bf0d2b06dfd7d0f0e04ccb2ac324a9dc2f176dba9e37e14d1bb333fd867500
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D6 5512 bytes
font_01_sfnt_off0000886f.bin
4fe1f535208a02be720e143bd4e504401c2b0ba596a8804ec70ce5941760d2ad
pdf-font-stream PDF embedded font (sfnt) at offset 0x886F 9940 bytes