Malicious PDF — malware analysis report

Static analysis result for SHA-256 206f7886e01e0809…

MALICIOUS

PDF

44.1 KB Created: 2020-08-15 23:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38b6e203e91927ca8190d809f027e4fd SHA-1: 7bccebeddbc418d1fdbb527a3e4733bae3051302 SHA-256: 206f7886e01e08099cf1902c206490a88ca5a9493349721b1fd75bb462b9b903
152 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external PDF files hosted on cdn.shopify.com. One of these links, https://ttraff.com/wb?keyword=evidence%20of%20evolution%20pdf, is identified as a known malicious redirector. The document's primary function appears to be to lure users into clicking these links, potentially leading them to malicious content or further compromise. The ML classifier strongly supports the malicious nature of this PDF.

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/wb?keyword=evidence%20of%20evolution%20pdf
    • http://files.kristinsurak.com/uploads/1/3/1/3/131383319/femoj.pdf
    • https://cdn.shopify.com/s/files/1/0436/4818/8569/files/gubosijorojev.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/twisted_treeline_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/all_full_form_of_computer_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/6275/5490/files/21428450968.pdf
    • https://cdn.shopify.com/s/files/1/0427/5693/1751/files/lugoxomijotopez.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3749/files/zumotawivisarujuwebim.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/preventive_cardiology_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/6446/7357/files/jekixofejuvojutorakifa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/25668779603.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/49811123231.pdf
    • https://cdn.shopify.com/s/files/1/0436/5778/9605/files/rifefaso.pdf
    • https://cdn.shopify.com/s/files/1/0434/3513/1036/files/biochemistry_metabolic_pathways.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_off000072dc.bin
ad1fb270b58177066a365a6156e521cef792bbe679a7bf1bcae5a1ccade3649b
pdf-font-stream PDF embedded font (sfnt) at offset 0x72DC 4684 bytes
font_01_sfnt_off000082e3.bin
90142a9df5ba450467786eaee3b48d95381534ee27867a73a077d410494dee6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E3 9748 bytes