Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4a4e4edda9d1ed…

MALICIOUS

PDF

34.2 KB Created: 2020-08-18 13:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d84ef87a55937e19a8bd9305542f12cc SHA-1: 06521617dc9b0c100c386a2d3a29fac5ffdc0aa2 SHA-256: cc4a4e4edda9d1edbc99608dd3701189d1b926af38bc4f0274a09d16de7befeb
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which are designed to appear as legitimate documents hosted on Shopify. However, one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the same suspicious URL, indicating an attempt to drive traffic to malicious content. 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.cc/pify?keyword=chota+chota+nanayuthu+female+video+song
    • http://files.toyourjoyaromas.com/uploads/1/3/0/7/130776220/nukezof-gazek-raxomereje-lerabepate.pdf
    • http://pivaxa.pure-sh.com/uploads/1/3/2/8/132814930/7085794.pdf
    • https://cdn.shopify.com/s/files/1/0439/1016/8744/files/69349842340.pdf
    • https://cdn.shopify.com/s/files/1/0434/0357/5454/files/star_trek_first_contact_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/8525/9159/files/assertiveness_workbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/2175/2731/files/tower_prep_cast.pdf
    • https://cdn.shopify.com/s/files/1/0440/8236/4566/files/30061866166.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/mebunefowu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/fodivenagofaputepiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/aiag_cqi_15_special_process_welding_system_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/pokemon_black_rom_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/76624403166.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_off0000490f.bin
82ba575dd4dbe23ab346d406f45eed2f9758fceb21fb9c4646c144b9580203f5
pdf-font-stream PDF embedded font (sfnt) at offset 0x490F 5408 bytes
font_01_sfnt_off00005b5f.bin
3adff73b3ae6497b7dfc81a43f8d434e5d670e5ada6c3ecd39eef71c75fa55a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 9972 bytes