Malicious PDF — malware analysis report

Static analysis result for SHA-256 afa035bdad5a7e16…

MALICIOUS

PDF

39.7 KB Created: 2020-08-09 12:40:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04454d5bb533e0d566fc56428eb6c27f SHA-1: 63adadf10499314048730c9baaf6c116718714d9 SHA-256: afa035bdad5a7e1612468adeae7f8b1fcdeb03808d7903825086869fbe1217ca
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=tumor+basocelular+pdf', suggesting a lure to a malicious site disguised as a PDF. The presence of numerous links and the ML classifier's high confidence indicate a malicious intent to redirect users to harmful content.

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=tumor+basocelular+pdf
    • http://files.driftlessloop.com/uploads/1/3/1/1/131163578/sewow-muvijarulo-jifoxudojejivum-pawinuzo.pdf
    • http://files.bagearoutdoors.com/uploads/1/3/1/4/131409128/b54812e.pdf
    • http://files.americastrumpet.com/uploads/1/3/0/9/130969446/puvederin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4166/8775/files/80763659718.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/58303825630.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/sequence_and_series_all_formula.pdf
    • https://cdn.shopify.com/s/files/1/0431/7157/8007/files/les_bases_de_l_agronomie.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/batim.pdf
    • https://cdn.shopify.com/s/files/1/0433/5199/8623/files/china_ip_addresses.pdf
    • https://cdn.shopify.com/s/files/1/0432/9144/3364/files/71175020763.pdf
    • https://cdn.shopify.com/s/files/1/0434/1936/9639/files/73160872957.pdf
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/how_to_find_minimum_value.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/tofixaleduropopiminelixu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/63558846229.pdf
    • https://cdn.shopify.com/s/files/1/0439/2199/7979/files/gegafuzoxobegamidosunezud.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/the_new_oxford_picture_dictionary_english_spanish_download.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_off00005dab.bin
2e950dc82e79947760413100671c7547fc304e7b2a5507341f683a66fa1cb100
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB 5392 bytes
font_01_sfnt_off00006fe1.bin
ce45dacb00fee105dfe2b47d78533d8aa26754d33812c3a10a014f27f034a20f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE1 10020 bytes