Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dba9232cc7f0df4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-23 14:27:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d2a0a1cb06780339487cdfe67338bab SHA-1: fedb348cace415603911848b102daccca175a502 SHA-256: 4dba9232cc7f0df40a1b539960df355cc842b52bb49f309dcdb05d2a44d01ff7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=marie+kondo+folding+sheets'. This indicates the document's primary purpose is to trick the user into visiting a malicious URL. The document body, though heavily obfuscated, also contains this URL, reinforcing the lure. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious 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=marie+kondo+folding+sheets
    • http://lulemovu.michellempnd.com/uploads/1/3/1/4/131438692/fdf485c6b5.pdf
    • http://files.davidhixoncounseling.com/uploads/1/3/2/3/132302924/7047d958ecd8425.pdf
    • http://bufutuwid.shanabergsma.com/uploads/1/3/2/6/132682182/fudumazama.pdf
    • http://wudejeju.karuklanguageresources.org/uploads/1/3/1/8/131871721/filisozonovor_witulada_teginazugita_bedafosanilaw.pdf
    • http://vuneri.afsanehtorabi.com/uploads/1/3/0/8/130873995/soxobadurebigorinan.pdf
    • https://cdn.shopify.com/s/files/1/0439/1020/1499/files/29047363217.pdf
    • https://cdn.shopify.com/s/files/1/0433/5068/7903/files/35582568394.pdf
    • https://cdn.shopify.com/s/files/1/0432/8564/3420/files/69406670957.pdf
    • https://cdn.shopify.com/s/files/1/0428/8629/9815/files/recette_aphrodisiaque_africaine.pdf
    • https://cdn.shopify.com/s/files/1/0433/8909/1998/files/compress_file_size_to_500kb_online.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84302935330.pdf
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/expediting_report_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/3881/0010/files/alcohol_y_diabetes_tipo_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/3914/6662/files/9903961160.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_off00005a60.bin
159bdbb6bd922f1dd9002cbeffe40e5f941b888694b7f247989a328354ea8ae8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A60 5236 bytes
font_01_sfnt_off00006c37.bin
9c0d2f8b14166a0618471ab594c182b1477b45585285e1390e38c9b3194b51c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C37 10060 bytes