Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cb6fb01813559c9…

MALICIOUS

PDF

42.5 KB Created: 2020-08-22 21:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1121fdb2b36f91f4e605814bac01fa1b SHA-1: ea9ab8b4bf71823809ba2ec24baaa4ae63a7818c SHA-256: 2cb6fb01813559c96ac42c66f1a9fc8ea53d3823abdd3bb529b1f3541c7cc076
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, including a primary redirector URL that is likely used to funnel victims to malicious sites. The presence of numerous Shopify-hosted PDF files suggests an attempt to disguise the malicious links within seemingly legitimate content.

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.cc/pify?keyword=jasper+ireport+group+header
    • http://files.lesprihaitimission.com/uploads/1/3/1/8/131856627/nokuxerago-fawuwo.pdf
    • http://files.testsuccesspodcast.com/uploads/1/3/1/3/131398171/15b09e30.pdf
    • http://files.fabscakes.com/uploads/1/3/2/7/132712040/57baa4c10b1c3.pdf
    • http://files.movingroomcoaching.net/uploads/1/3/2/6/132681634/7b79a39ee.pdf
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/39444645607.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/44785440992.pdf
    • https://cdn.shopify.com/s/files/1/0438/3821/0205/files/76311291375.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3444/files/diwekizibiporimoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/pdf_xchange_pro_serial_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/popewire.pdf
    • https://cdn.shopify.com/s/files/1/0434/8028/5348/files/56039041802.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/pixiti.pdf
    • https://cdn.shopify.com/s/files/1/0434/2359/6711/files/catalogo_cable_belden.pdf
    • https://cdn.shopify.com/s/files/1/0429/0756/6239/files/vuvonewifipetizunub.pdf
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/pajanejet.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/sekunogan.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/dosamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0544/4259/files/cracking_codes_with_python_2020.pdf
    • https://cdn.shopify.com/s/files/1/0440/6195/0117/files/tajamalinow.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_off000068a5.bin
f351e1dd0055f28ab9a3c2a49cb1919d77c38d110bc1cec3e7414067c4ce703a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68A5 5176 bytes
font_01_sfnt_off00007a34.bin
74a1a4974927856a2ec8ac1f85a815ab66ea7964188a04d475390f9755ff9c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A34 10056 bytes

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