Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a5e5281a874f50…

MALICIOUS

PDF

39.8 KB Created: 2020-08-09 00:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3e79e2c9849fe00c65b987fe0fa6947 SHA-1: 2d4052e544e93fc6fb3a4b6d1702cf9fdf2ec99f SHA-256: e8a5e5281a874f507f351c428bc98181d85e26297c9bdcd6dbf20d567b6b620d
154 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 `https://ttraff.cc/pify?keyword=field+crops+and+cereal+production+pdf`. This link is presented within the document body, disguised as information related to 'field crops and cereal production'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=field+crops+and+cereal+production+pdf
    • http://files.authorcharityayres.com/uploads/1/3/1/4/131437981/ziwilegavefur-zirenirama.pdf
    • http://files.myaustraliannews.com.au/uploads/1/3/1/3/131384300/1932b393e2d.pdf
    • http://files.rhamonabarberphotography.com/uploads/1/3/0/9/130969572/mizedexelode_fufomu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0477/2000/files/48141971703.pdf
    • https://cdn.shopify.com/s/files/1/0433/9279/4774/files/92429338972.pdf
    • https://cdn.shopify.com/s/files/1/0429/5150/8131/files/7651023002.pdf
    • https://cdn.shopify.com/s/files/1/0429/1044/9830/files/72672419877.pdf
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/2906438326.pdf
    • https://cdn.shopify.com/s/files/1/0435/9222/0840/files/archicad_22_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/xawikika.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/pawute.pdf
    • https://cdn.shopify.com/s/files/1/0432/7365/0334/files/the_legend_of_zelda_ocarina_of_time_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0349/4043/files/quantitative_data_analysis_tools.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0434/3070/7356/files/19988260298.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/79909964061.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_off00005e64.bin
b36fe12eea9a2f2b7924c848d55274aa69f6b4e04c8b64415b1eb0bd73dc5cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E64 5104 bytes
font_01_sfnt_off00006fd1.bin
ad2b5859df13eeef39f5cfe7245cba5e53585673cf698a005dfffe08b4d5c2f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD1 10140 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.