Malicious PDF — malware analysis report

Static analysis result for SHA-256 32f8e80e13484949…

MALICIOUS

PDF

45.6 KB Created: 2020-08-24 21:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 268e6ba700d1e8254658b5002aa6870d SHA-1: 63feda4404835f8cd4ff928c80c049a853380b96 SHA-256: 32f8e80e13484949ef48f3f2621a2792d0cb9cc8ccbabd3cfb5f0597b9458092
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector at 'https://ttraff.com/pify?keyword=cellule+staminali+mesenchimali+pdf'. The document body also contains this URL and a large number of other PDF links, many hosted on cdn.shopify.com, suggesting a link farm designed to obscure the malicious destination. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=cellule+staminali+mesenchimali+pdf
    • http://files.cupparosielee.com/uploads/1/3/1/8/131856257/wurosozutodude-jemiden-vutajo-ladegamopu.pdf
    • http://gajuwab.elukproductions.com/uploads/1/3/2/8/132814930/5113298.pdf
    • http://files.trampntrekker.com/uploads/1/3/1/0/131071067/2058225.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/megoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/povumad.pdf
    • https://cdn.shopify.com/s/files/1/0429/9915/2799/files/lafusazetamusufimufixop.pdf
    • https://cdn.shopify.com/s/files/1/0447/7734/1079/files/alvaro_soler_la_cintura_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0431/6217/3604/files/56305714525.pdf
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/.pdf
    • https://cdn.shopify.com/s/files/1/0445/4688/3748/files/madutadekirireniwuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdf
    • https://cdn.shopify.com/s/files/1/0443/9402/1030/files/cytosol_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/mewumozelajukuvofupil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060f2.bin
bca959ffe9254b2a1e670d3fd9029a115b143c216623790ece860bc90fc16bbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x60F2 5092 bytes
font_01_sfnt_off00007218.bin
ca319d217a5ebb5c1858ff5451093202e13e01edc1b70967cb23f2881527c19b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7218 12772 bytes
font_02_sfnt_off00009a26.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A26 4324 bytes