Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e02d6099b83490a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-21 07:42:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2dddd19d0a1fcf414f34603ae28a0f7f SHA-1: 4d27813e08eb9f6403d74a2924aebd9188ee0249 SHA-256: 9e02d6099b83490a0329c1341634e53f9c3a9762776a45f9a23f41ed71838e39
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.ru/pify?keyword=sheetz+hangover+cure+smoothie', is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and contains what appears to be a reference to the malicious URL, suggesting a lure or redirection mechanism.

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.ru/pify?keyword=sheetz+hangover+cure+smoothie
    • http://papurejug.dmdgo.com/uploads/1/3/0/7/130775374/2338589.pdf
    • http://files.deanocraft.com/uploads/1/3/0/9/130970016/e20c9be.pdf
    • https://cdn.shopify.com/s/files/1/0447/9575/6693/files/browser_terbaik_untuk_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7464/files/28451331427.pdf
    • https://cdn.shopify.com/s/files/1/0433/4062/8120/files/zoxoputi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7663/3247/files/79273327453.pdf
    • https://cdn.shopify.com/s/files/1/0436/9124/5733/files/rabimefigebupojivugetizo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5823/2473/files/ultrasound_guided_spinal_accessory_nerve_block.pdf
    • https://cdn.shopify.com/s/files/1/0431/3343/6055/files/liturgy_of_the_hours_guide_2016.pdf
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/51220901178.pdf
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/pdf_to_dwg_file_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9679/3503/files/26901530872.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_off00007404.bin
bb67de4d6a077539eb37bf6412c8c215d792c79446ac0a1b6f12dcf49bc8c745
pdf-font-stream PDF embedded font (sfnt) at offset 0x7404 5392 bytes
font_01_sfnt_off0000863c.bin
999b1e24d2f3b75c69ae41a1b0806b8d85607713a187f0779a0d93208dfde49a
pdf-font-stream PDF embedded font (sfnt) at offset 0x863C 10352 bytes